4*10=40
10*4=40
40:10=4
40:4=10
20*3=60
3*20=60
60:20=3
60:3=20
8*100=800
100*8=800
800:100=8
800:8=100
И т.д.
4*10=40
10*4=40
40:10=4
40:4=10
20*3=60
3*20=60
60:20=3
60:3=20
8*100=800
100*8=800
800:100=8
800:8=100
И т.д.