Show:
5
6
7
8
9
100

5x5

25

100

7x6

42

100

1x7

7

100
8x1

8

100

9x9

81

200

5x7

35

200

1x6

6

200

2x7

14

200

2x8

16

200

3x9

27

300

6x5

30

300

5x6

30

300

3x7

21

300

3x8

24

300

7x9

63

400

11x5

55

400

11x6

66

400

9x7

63

400

1x8

8

400

5x9

40

500

800x5

4,000

500

70x6

420

500

90x7

630

500

80x2

160

500

6x9

54