Easy
1 x 1
2
12 x 12
144
24 x 13
312
640 x 500
320000
140 x 30
4200
5 x 5
25
13 x 5
65
25 x 25
625
320 x 400
128000
2500 x 20
50000
6 x 7
42
13 x 12
156
120 x 10
1200
160 x 34
5440
770 x 40
30800
2 x 4
8
14 x 7
98
160 x 20
3200
150 x 23
3450
3000 x 600
1800000
3 x 3
9
15 x 12
180
110 x 20
2200
600 x 60
36000
4000 x 400
1600000