Multiply by
3
3
4x3
12
1x4
4
2x5
10
2x6
12
10x7
70
11x3
33
3x4
12
9x5
45
11x6
66
1x7
7
3x3
9
10x4
40
1x5
5
1x6
6
3x7
21
9x3
27
4x4
16
7x5
35
9x6
54
11x7
77
5x3
15
11x4
44
10x5
50
5x6
30
5x7
35
1x3
3
5x4
20
3x5
15
7x6
42
6x7
42
6x3
18
9x4
36
5x5
25
12x6
72
2x7
14