Show:
multiply x2
multiply x5
multiply by 10
multiply by 11
100

2x2

4

100

5x2

10

100

10x2

20

100
11x1

11

200

2x4

8
200

5x4

20

200

10x4

40

200

11x3

33

300

2x6

12

300

5x6

30

300

10x7

70

300

11x5

55

400

2x7

14

400

5x8

40

400

10x9

90

400

11x8

88

500
2x9

18

500

5x9

45

500

10x10

100

500

11x9

99