1、4 x 1 = 6 x 9 = 9 x 4 = 8 x 4 = 4 x 6 =6 x 5 = 8 x 8 = 9 x 6 = 6 x 2 = 5 x 7 =5 x 8 = 2 x 3 = 2 x 4 = 4 x 6 = 7 x 6 =9 x 9 = 2 x 6 = 5 x 4 = 2 x 2 = 5 x 7 =5 x 3 = 9 x 7 = 9 x 9 = 6 x 2 = 3 x 7 =9 x 9 = 4 x 8 = 4 x 1 = 6 x 5 = 4 x 9 =7 x 2 = 4 x 2 = 4 x 7 = 9 x 8 = 3 x 9 =9 x 5 = 7 x 2 = 2 x 5 = 3 x
2、 5 = 5 x 5 =6 x 9 = 7 x 2 = 2 x 7 = 4 x 3 = 2 x 7 =5 x 7 = 9 x 2 = 2 x 3 = 3 x 6 = 7 x 4 =3 x 6 = 1 x 6 = 1 x 4 = 5 x 8 = 1 x 5 =6 x 7 = 5 x 9 = 1 x 6 = 8 x 7 = 1 x 7 =8 x 3 = 5 x 2 = 6 x 6 = 2 x 2 = 7 x 3 =1 x 1 = 1 x 3 = 8 x 1 = 5 x 7 = 7 x 8 =1 x 9 = 9 x 8 = 1 x 7 = 9 x 1 = 3 x 6 =5 x 6 = 5 x 9 =
3、 5 x 2 = 6 x 6 = 3 x 9 =7 x 6 = 8 x 7 = 7 x 9 = 4 x 8 = 1 x 3 =9 x 5 = 5 x 8 = 5 x 7 = 2 x 2 = 2 x 6 =6 x 5 = 7 x 8 = 3 x 9 = 4 x 8 = 9 x 1 =7 x 5 = 4 x 7 = 1 x 6 = 2 x 5 = 6 x 9 =分页符6 x 1 = 2 x 6 = 3 x 3 = 2 x 5 = 8 x 4 =9 x 2 = 7 x 3 = 5 x 4 = 3 x 1 = 3 x 1 =6 x 9 = 3 x 9 = 6 x 4 = 8 x 5 = 5 x 1 =
4、6 x 4 = 4 x 1 = 3 x 4 = 4 x 2 = 2 x 2 =1 x 3 = 1 x 9 = 7 x 1 = 2 x 3 = 3 x 5 =2 x 8 = 6 x 3 = 2 x 3 = 5 x 9 = 9 x 6 =7 x 6 = 3 x 2 = 2 x 4 = 4 x 7 = 8 x 5 =4 x 6 = 9 x 8 = 7 x 7 = 6 x 8 = 4 x 5 =3 x 1 = 1 x 3 = 1 x 1 = 2 x 4 = 9 x 2 =6 x 7 = 7 x 1 = 7 x 4 = 1 x 8 = 5 x 7 =6 x 3 = 8 x 8 = 5 x 2 = 9 x
5、 7 = 3 x 6 =5 x 1 = 5 x 8 = 8 x 3 = 7 x 4 = 5 x 4 =9 x 1 = 7 x 9 = 5 x 6 = 8 x 8 = 9 x 5 =5 x 3 = 7 x 6 = 4 x 1 = 5 x 2 = 5 x 7 =8 x 3 = 2 x 9 = 7 x 9 = 6 x 9 = 8 x 2 =9 x 2 = 5 x 7 = 4 x 2 = 3 x 1 = 7 x 7 =1 x 4 = 5 x 4 = 2 x 3 = 3 x 1 = 2 x 9 =6 x 8 = 2 x 9 = 7 x 2 = 2 x 2 = 4 x 1 =2 x 4 = 6 x 8 =
6、 7 x 1 = 4 x 6 = 8 x 4 =3 x 8 = 3 x 5 = 5 x 2 = 1 x 5 = 3 x 8 =分页符1 x 3 = 7 x 3 = 2 x 7 = 8 x 6 = 1 x 6 =1 x 1 = 8 x 5 = 9 x 5 = 8 x 2 = 7 x 2 =2 x 6 = 5 x 2 = 1 x 4 = 3 x 9 = 6 x 3 =1 x 2 = 8 x 5 = 2 x 1 = 1 x 3 = 6 x 3 =8 x 9 = 1 x 6 = 8 x 9 = 7 x 1 = 2 x 8 =4 x 3 = 8 x 2 = 3 x 2 = 6 x 5 = 8 x 3 =
7、6 x 1 = 1 x 5 = 3 x 1 = 7 x 1 = 9 x 4 =8 x 3 = 7 x 2 = 7 x 1 = 2 x 6 = 3 x 6 =3 x 7 = 3 x 6 = 5 x 3 = 4 x 8 = 4 x 4 =1 x 2 = 9 x 9 = 8 x 7 = 4 x 9 = 4 x 3 =7 x 1 = 4 x 8 = 9 x 3 = 9 x 1 = 1 x 3 =7 x 2 = 1 x 1 = 2 x 3 = 1 x 1 = 9 x 8 =4 x 1 = 8 x 8 = 8 x 8 = 4 x 9 = 3 x 3 =1 x 7 = 5 x 4 = 3 x 9 = 3 x
8、 2 = 8 x 8 =5 x 9 = 1 x 6 = 5 x 7 = 2 x 1 = 5 x 4 =7 x 4 = 7 x 6 = 2 x 3 = 2 x 9 = 8 x 2 =9 x 8 = 9 x 4 = 3 x 3 = 5 x 4 = 8 x 8 =2 x 4 = 3 x 8 = 2 x 1 = 7 x 7 = 4 x 1 =1 x 4 = 8 x 4 = 2 x 1 = 2 x 4 = 1 x 1 =2 x 3 = 3 x 7 = 8 x 2 = 1 x 8 = 1 x 4 =分页符7 x 5 = 1 x 8 = 7 x 2 = 4 x 9 = 8 x 2 =6 x 1 = 6 x
9、1 = 6 x 8 = 6 x 9 = 5 x 3 =7 x 8 = 2 x 4 = 3 x 7 = 9 x 9 = 1 x 2 =8 x 2 = 3 x 1 = 7 x 4 = 1 x 4 = 3 x 9 =1 x 1 = 1 x 2 = 6 x 3 = 6 x 4 = 2 x 2 =8 x 4 = 1 x 3 = 3 x 1 = 6 x 5 = 2 x 9 =4 x 9 = 2 x 6 = 2 x 5 = 1 x 7 = 9 x 6 =1 x 9 = 1 x 2 = 6 x 4 = 7 x 2 = 9 x 4 =8 x 2 = 7 x 4 = 9 x 8 = 2 x 8 = 7 x 5 =
10、5 x 1 = 7 x 3 = 9 x 6 = 3 x 7 = 9 x 7 =3 x 1 = 7 x 8 = 8 x 7 = 3 x 9 = 7 x 6 =6 x 8 = 8 x 2 = 2 x 9 = 3 x 5 = 9 x 5 =5 x 9 = 9 x 4 = 9 x 3 = 1 x 2 = 6 x 7 =5 x 4 = 1 x 5 = 2 x 7 = 2 x 6 = 9 x 6 =6 x 6 = 6 x 8 = 9 x 8 = 2 x 3 = 1 x 2 =6 x 1 = 1 x 7 = 5 x 9 = 2 x 9 = 4 x 1 =2 x 7 = 6 x 8 = 4 x 9 = 5 x
11、 6 = 4 x 7 =7 x 6 = 6 x 3 = 9 x 2 = 4 x 5 = 8 x 4 =3 x 1 = 1 x 7 = 4 x 8 = 1 x 8 = 3 x 1 =2 x 5 = 9 x 5 = 3 x 1 = 1 x 6 = 7 x 5 =分页符7 x 4 = 2 x 6 = 6 x 8 = 2 x 4 = 6 x 1 =5 x 3 = 5 x 8 = 4 x 8 = 8 x 3 = 7 x 3 =3 x 3 = 3 x 5 = 3 x 1 = 8 x 3 = 7 x 8 =9 x 8 = 7 x 8 = 8 x 6 = 4 x 8 = 9 x 7 =3 x 8 = 8 x
12、7 = 9 x 1 = 2 x 7 = 7 x 4 =8 x 8 = 1 x 6 = 3 x 6 = 1 x 6 = 9 x 6 =4 x 5 = 3 x 7 = 9 x 2 = 9 x 3 = 6 x 9 =6 x 1 = 7 x 8 = 3 x 3 = 4 x 7 = 4 x 1 =8 x 3 = 5 x 1 = 3 x 1 = 1 x 6 = 5 x 6 =2 x 2 = 1 x 8 = 8 x 1 = 5 x 3 = 7 x 6 =3 x 2 = 1 x 4 = 7 x 2 = 7 x 2 = 7 x 1 =8 x 9 = 2 x 1 = 8 x 1 = 9 x 6 = 7 x 7 =
13、7 x 9 = 4 x 8 = 7 x 7 = 8 x 9 = 2 x 2 =2 x 7 = 5 x 5 = 4 x 7 = 6 x 9 = 4 x 3 =2 x 9 = 7 x 3 = 7 x 7 = 8 x 8 = 1 x 3 =3 x 7 = 6 x 6 = 8 x 8 = 3 x 2 = 1 x 3 =1 x 9 = 2 x 5 = 1 x 9 = 6 x 9 = 1 x 1 =1 x 6 = 4 x 5 = 9 x 1 = 5 x 2 = 3 x 2 =7 x 9 = 6 x 6 = 3 x 6 = 3 x 9 = 8 x 2 =7 x 1 = 2 x 6 = 7 x 1 = 2 x
14、 5 = 6 x 2 =分页符7 x 2 = 5 x 1 = 4 x 9 = 8 x 2 = 9 x 1 =4 x 8 = 9 x 6 = 4 x 7 = 5 x 3 = 7 x 7 =6 x 7 = 4 x 6 = 2 x 4 = 1 x 8 = 1 x 5 =6 x 5 = 9 x 5 = 8 x 8 = 1 x 8 = 8 x 1 =6 x 9 = 8 x 9 = 1 x 9 = 7 x 1 = 3 x 9 =3 x 8 = 9 x 6 = 3 x 9 = 7 x 1 = 9 x 5 =2 x 2 = 1 x 5 = 8 x 2 = 3 x 8 = 6 x 3 =2 x 4 = 5 x
15、8 = 8 x 7 = 7 x 4 = 9 x 3 =8 x 1 = 9 x 1 = 3 x 2 = 5 x 7 = 4 x 5 =5 x 9 = 8 x 8 = 5 x 5 = 5 x 1 = 7 x 9 =2 x 4 = 7 x 2 = 6 x 4 = 4 x 3 = 8 x 9 =9 x 5 = 1 x 5 = 7 x 6 = 6 x 3 = 1 x 9 =4 x 8 = 6 x 1 = 9 x 7 = 6 x 5 = 8 x 4 =3 x 4 = 7 x 1 = 7 x 4 = 1 x 9 = 5 x 6 =4 x 5 = 8 x 6 = 1 x 3 = 6 x 4 = 8 x 9 =
16、9 x 7 = 6 x 9 = 3 x 9 = 5 x 6 = 7 x 4 =9 x 2 = 9 x 9 = 2 x 3 = 1 x 1 = 6 x 3 =3 x 5 = 4 x 2 = 5 x 8 = 7 x 4 = 6 x 4 =1 x 2 = 2 x 9 = 1 x 9 = 6 x 6 = 5 x 6 =6 x 3 = 7 x 2 = 7 x 8 = 7 x 1 = 7 x 3 =分页符9 x 1 = 6 x 4 = 2 x 6 = 8 x 6 = 8 x 2 =3 x 3 = 8 x 2 = 7 x 6 = 2 x 7 = 3 x 9 =1 x 7 = 5 x 7 = 2 x 9 =
17、8 x 1 = 8 x 8 =1 x 3 = 5 x 3 = 8 x 5 = 6 x 1 = 9 x 3 =2 x 8 = 5 x 3 = 2 x 9 = 2 x 2 = 1 x 2 =6 x 3 = 9 x 9 = 3 x 7 = 2 x 2 = 4 x 3 =9 x 7 = 4 x 4 = 2 x 4 = 7 x 5 = 4 x 6 =8 x 1 = 3 x 9 = 8 x 4 = 4 x 4 = 8 x 2 =2 x 4 = 5 x 3 = 3 x 3 = 9 x 6 = 9 x 6 =1 x 8 = 9 x 2 = 9 x 8 = 2 x 3 = 2 x 1 =7 x 3 = 6 x
18、7 = 2 x 4 = 3 x 7 = 6 x 4 =9 x 6 = 5 x 4 = 1 x 1 = 1 x 7 = 4 x 5 =3 x 5 = 7 x 5 = 8 x 2 = 9 x 7 = 4 x 1 =3 x 4 = 5 x 1 = 3 x 3 = 7 x 2 = 7 x 4 =8 x 9 = 4 x 5 = 1 x 4 = 2 x 5 = 3 x 3 =7 x 4 = 5 x 7 = 6 x 5 = 8 x 8 = 3 x 2 =7 x 6 = 8 x 5 = 7 x 8 = 8 x 9 = 9 x 3 =4 x 2 = 1 x 2 = 2 x 9 = 7 x 2 = 8 x 6 =
19、1 x 9 = 8 x 2 = 4 x 2 = 5 x 6 = 7 x 1 =9 x 1 = 4 x 1 = 2 x 3 = 5 x 8 = 1 x 5 =分页符4 x 4 = 6 x 3 = 9 x 9 = 1 x 9 = 2 x 8 =6 x 5 = 3 x 1 = 8 x 6 = 7 x 8 = 5 x 8 =1 x 7 = 3 x 1 = 3 x 5 = 6 x 8 = 1 x 5 =7 x 9 = 4 x 4 = 6 x 6 = 9 x 8 = 5 x 1 =3 x 6 = 8 x 9 = 4 x 6 = 7 x 7 = 6 x 5 =1 x 9 = 9 x 8 = 9 x 9 =
20、5 x 3 = 5 x 2 =5 x 5 = 1 x 1 = 6 x 3 = 1 x 8 = 4 x 8 =7 x 1 = 1 x 7 = 1 x 6 = 6 x 6 = 1 x 3 =6 x 1 = 1 x 6 = 4 x 2 = 3 x 7 = 4 x 3 =6 x 6 = 8 x 2 = 7 x 6 = 1 x 9 = 3 x 6 =3 x 9 = 8 x 1 = 6 x 2 = 4 x 4 = 6 x 3 =6 x 4 = 9 x 4 = 7 x 1 = 3 x 5 = 6 x 5 =1 x 7 = 7 x 3 = 2 x 4 = 8 x 7 = 7 x 5 =9 x 3 = 7 x
21、1 = 8 x 1 = 9 x 1 = 8 x 5 =7 x 5 = 6 x 9 = 5 x 6 = 1 x 3 = 7 x 9 =7 x 2 = 5 x 4 = 9 x 3 = 5 x 2 = 2 x 3 =5 x 9 = 3 x 5 = 5 x 4 = 6 x 1 = 9 x 2 =4 x 8 = 7 x 4 = 8 x 9 = 2 x 7 = 9 x 2 =5 x 5 = 6 x 8 = 6 x 5 = 3 x 4 = 7 x 5 =9 x 3 = 6 x 2 = 2 x 5 = 8 x 7 = 2 x 9 =分页符9 x 7 = 1 x 2 = 2 x 9 = 2 x 8 = 7 x
22、7 =1 x 5 = 3 x 6 = 8 x 1 = 9 x 1 = 5 x 9 =6 x 8 = 1 x 4 = 2 x 4 = 9 x 7 = 6 x 8 =3 x 1 = 6 x 5 = 8 x 4 = 3 x 3 = 6 x 2 =9 x 2 = 9 x 2 = 9 x 5 = 7 x 7 = 3 x 3 =5 x 6 = 5 x 3 = 4 x 3 = 3 x 5 = 4 x 9 =3 x 9 = 3 x 5 = 1 x 7 = 7 x 8 = 4 x 2 =5 x 9 = 4 x 5 = 4 x 5 = 1 x 4 = 4 x 5 =3 x 9 = 7 x 4 = 3 x 3 =
23、1 x 6 = 5 x 5 =4 x 8 = 4 x 2 = 2 x 1 = 2 x 2 = 7 x 5 =4 x 7 = 6 x 3 = 9 x 6 = 5 x 5 = 7 x 4 =9 x 3 = 1 x 8 = 1 x 4 = 1 x 8 = 2 x 3 =9 x 3 = 1 x 5 = 1 x 5 = 8 x 5 = 1 x 1 =8 x 4 = 5 x 9 = 1 x 1 = 8 x 6 = 2 x 3 =7 x 5 = 3 x 9 = 5 x 1 = 4 x 7 = 8 x 1 =5 x 5 = 7 x 9 = 3 x 9 = 1 x 8 = 4 x 8 =6 x 2 = 9 x
24、5 = 5 x 6 = 8 x 3 = 8 x 5 =4 x 7 = 3 x 7 = 5 x 5 = 6 x 7 = 8 x 2 =6 x 8 = 3 x 3 = 6 x 4 = 1 x 9 = 6 x 4 =8 x 3 = 9 x 7 = 3 x 8 = 4 x 9 = 1 x 9 =分页符6 x 7 = 9 x 3 = 7 x 8 = 5 x 4 = 2 x 6 =4 x 8 = 8 x 2 = 5 x 5 = 4 x 9 = 7 x 7 =1 x 5 = 9 x 7 = 9 x 3 = 7 x 3 = 7 x 2 =7 x 8 = 1 x 5 = 7 x 1 = 7 x 8 = 5 x
25、4 =3 x 4 = 4 x 2 = 6 x 9 = 1 x 2 = 9 x 7 =2 x 3 = 2 x 2 = 4 x 6 = 5 x 2 = 8 x 7 =9 x 7 = 9 x 7 = 2 x 7 = 5 x 9 = 7 x 5 =8 x 8 = 7 x 9 = 1 x 2 = 8 x 7 = 6 x 7 =2 x 8 = 8 x 2 = 4 x 3 = 2 x 1 = 3 x 9 =5 x 8 = 7 x 4 = 2 x 6 = 1 x 3 = 4 x 1 =6 x 7 = 5 x 7 = 3 x 4 = 3 x 9 = 6 x 7 =9 x 4 = 2 x 3 = 5 x 2 =
26、5 x 1 = 3 x 9 =2 x 5 = 7 x 7 = 8 x 1 = 2 x 4 = 7 x 2 =4 x 5 = 5 x 5 = 6 x 1 = 2 x 6 = 2 x 5 =7 x 7 = 1 x 8 = 8 x 1 = 3 x 4 = 6 x 4 =7 x 3 = 4 x 9 = 6 x 4 = 5 x 9 = 9 x 2 =9 x 4 = 5 x 1 = 3 x 9 = 9 x 8 = 2 x 8 =5 x 7 = 4 x 8 = 1 x 4 = 3 x 3 = 2 x 8 =7 x 4 = 5 x 1 = 8 x 3 = 2 x 7 = 7 x 8 =7 x 8 = 1 x
27、9 = 6 x 9 = 2 x 9 = 6 x 2 =分页符2 x 2 = 3 x 9 = 3 x 1 = 6 x 2 = 6 x 6 =4 x 8 = 3 x 3 = 4 x 4 = 7 x 7 = 4 x 8 =6 x 9 = 1 x 6 = 9 x 6 = 6 x 4 = 4 x 9 =5 x 1 = 6 x 6 = 7 x 8 = 8 x 4 = 5 x 7 =2 x 9 = 1 x 7 = 9 x 2 = 8 x 1 = 2 x 9 =4 x 3 = 1 x 6 = 2 x 9 = 6 x 8 = 1 x 2 =3 x 4 = 4 x 7 = 4 x 9 = 7 x 5 = 7 x
28、8 =2 x 3 = 5 x 5 = 8 x 9 = 5 x 8 = 6 x 2 =7 x 9 = 9 x 6 = 1 x 4 = 1 x 2 = 1 x 4 =6 x 2 = 1 x 5 = 6 x 8 = 3 x 2 = 4 x 8 =2 x 5 = 8 x 8 = 6 x 5 = 6 x 3 = 2 x 9 =7 x 7 = 5 x 8 = 2 x 5 = 4 x 3 = 8 x 5 =3 x 3 = 3 x 4 = 9 x 3 = 2 x 4 = 5 x 3 =6 x 9 = 1 x 2 = 3 x 3 = 4 x 8 = 6 x 8 =7 x 7 = 2 x 8 = 5 x 6 =
29、9 x 2 = 3 x 3 =4 x 7 = 2 x 5 = 9 x 8 = 7 x 5 = 1 x 4 =8 x 2 = 4 x 7 = 4 x 8 = 5 x 8 = 8 x 5 =6 x 6 = 3 x 1 = 9 x 3 = 7 x 2 = 3 x 6 =6 x 3 = 8 x 8 = 7 x 1 = 8 x 4 = 5 x 4 =3 x 8 = 5 x 8 = 8 x 2 = 3 x 7 = 6 x 2 =分页符5 x 7 = 6 x 6 = 5 x 1 = 9 x 8 = 4 x 7 =2 x 5 = 8 x 9 = 6 x 4 = 5 x 4 = 2 x 7 =3 x 8 = 2
30、 x 6 = 7 x 8 = 9 x 9 = 9 x 6 =7 x 9 = 9 x 6 = 2 x 3 = 2 x 4 = 6 x 3 =3 x 6 = 3 x 4 = 8 x 1 = 1 x 2 = 3 x 4 =8 x 5 = 4 x 9 = 6 x 3 = 2 x 2 = 3 x 2 =7 x 7 = 1 x 2 = 7 x 3 = 4 x 6 = 2 x 8 =2 x 7 = 8 x 7 = 4 x 5 = 8 x 8 = 9 x 3 =4 x 3 = 1 x 9 = 9 x 2 = 8 x 9 = 4 x 7 =7 x 6 = 4 x 5 = 8 x 8 = 6 x 7 = 2 x
31、7 =7 x 3 = 6 x 1 = 2 x 3 = 6 x 8 = 7 x 2 =1 x 1 = 6 x 9 = 9 x 2 = 9 x 4 = 8 x 5 =3 x 7 = 3 x 4 = 2 x 9 = 9 x 1 = 7 x 1 =6 x 5 = 7 x 8 = 8 x 5 = 2 x 2 = 1 x 4 =7 x 1 = 6 x 2 = 2 x 4 = 4 x 1 = 4 x 8 =7 x 2 = 9 x 9 = 9 x 3 = 7 x 8 = 4 x 7 =1 x 3 = 6 x 1 = 2 x 5 = 9 x 7 = 8 x 4 =5 x 2 = 6 x 6 = 5 x 8 =
32、8 x 8 = 4 x 7 =4 x 3 = 5 x 6 = 3 x 6 = 7 x 4 = 4 x 5 =2 x 8 = 7 x 3 = 2 x 3 = 2 x 3 = 8 x 1 =分页符1 x 5 = 7 x 6 = 7 x 9 = 2 x 3 = 2 x 6 =3 x 7 = 5 x 5 = 2 x 1 = 1 x 1 = 7 x 3 =3 x 9 = 8 x 8 = 3 x 5 = 8 x 4 = 5 x 7 =6 x 6 = 9 x 8 = 9 x 8 = 3 x 5 = 6 x 7 =8 x 8 = 8 x 6 = 7 x 7 = 3 x 2 = 1 x 3 =7 x 4 = 9
33、 x 1 = 7 x 3 = 3 x 8 = 4 x 4 =3 x 7 = 4 x 9 = 6 x 6 = 3 x 3 = 7 x 6 =5 x 6 = 7 x 9 = 9 x 2 = 5 x 1 = 3 x 3 =8 x 9 = 8 x 7 = 6 x 7 = 9 x 2 = 5 x 2 =6 x 1 = 5 x 8 = 1 x 3 = 1 x 6 = 6 x 9 =1 x 4 = 6 x 1 = 8 x 8 = 7 x 4 = 7 x 5 =2 x 4 = 4 x 8 = 1 x 2 = 3 x 9 = 6 x 5 =1 x 3 = 4 x 4 = 3 x 1 = 6 x 6 = 1 x 9 =2 x 8 = 5 x 7 = 2 x 9 = 2 x 6 = 1 x 4 =4 x 1 = 8 x 4 = 5 x 2 = 3 x 9 = 9 x 8 =5 x 4 = 7 x 2 = 8 x 5 = 4 x 4 = 9 x 8 =9 x 7 = 7 x 8 = 8 x 6 = 1 x 3 = 7 x 3 =9 x 2 = 5 x 6 = 3 x 4 = 5 x 8 = 7 x 8 =5 x 3 = 8 x 7 = 6 x 9 = 7 x 4 = 1 x 8 =2 x 2 = 4 x 8 = 4 x 2 = 2 x 1 = 3 x 1 =