Show:
x2
x3
x4
100

1 x 2

2

100
3 x 3

9

100

2 x 4

8

200

3 x 2

6

200

4 x 3

12

200

4 x 4

16

300
6 x 2

12

300

6 x 3

18

300

4 x 5

20

400

7 x 2

14

400

7 x 3

21

400

6 x 4

24

500

9 x 2

18

500

8 x 3

24

500

4 x 8

32