Show:
6x
7x
8x
9x
easy x
100

6x4


24


100

7x5


35

100

8x5


40

100

9x5

45


100

1x8


8


200

6x5


30


200

7x6


42

200

8x6


48


200

9x6


54


200

1x1


1


300

6x6


36


300

7x7


49

300

8x7


56

300

9x7


63


300

2x10


20

400

6x8


48


400

7x8

56

400

8x8


64


400

9x8


72

400

10x7


70

500

6x9

54

500

7x9

63


500

8x9


72

500

9x9

81

500

2x8


16