6
7
8
9
12
100

6x1?

6

100

7x1

7

100

8x2

16

100

9x1=?

9

100

12x9

108

200

6x6?

36

200

7x6

42

200

8x6

48

200

9x2

18

200

12x5

60

300

6x8

48

300

7x7?

49

300

8x4

40

300

9x6

54

300

12x6

72

400

6x9

54

400

7x9

63

400

8x11

88

400

9x9

81

400

12x11

132

500

6x12?

72

500

7x12

84

500

8x12

96

500

9x11

99

500

12x12

What is 144

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