4x3
12
6x5
30
7x5
35
8x6
48
9x9
81
4x4
16
6x6
36
7x6
42
8x7
56
9x5
=45
4x5
20
6x7
7x7
49
8x8
64
9x11
=99
4x6
24
6x8
7x8
8x9
72
9x10
=90
4x7
28
6x9
54
7x9
63
8x10
80
9x12
=108