Show:
1
2
3
4
5
6
100

2x2

4

100

3x1

3

100

8x0

0

100

10x0

0

100

1x7

7

100

1 x 9

9

200

3x2

6

200

7x2

14

200

3x3

9

200

6x5

30

200

7x10

70

200

3 x 8=

24

300

7x7

49

300

6x6

36

300

4x4

16

300

5x5

25

300

7x5

35

300

8x4

32

400

7x7

49

400

8x3

24

400

9x3

27

400

9x7

63

400

8x6

48

400

6 x 7 =

42

500

8x9

72

500

9x9

81

500

4x9

36

500

9x8

72

500

11x11

121

500

8x8

64