1 digit by 1 digit
4x2
8
9x4
36
12x3
36
376x3
1,128
231x4
924
6x6
36
9x6
54
12x4
48
144x9
1,296
437x5
2,185
7x4
28
9x7
63
12x5
60
783x6
4,698
689x6
4,134
8x6
48
9x8
72
30x7
210
123x22
2,706
168x14
2,352
7x8
56
9x9
81
37x8
296
754x53
39,962
987x52
51,324