a 72 72 72 72
B 2 3 4 6 8
a:B 18 12 9 72 1

72/2=3672/3=24х/4=18 = 18*4=72 = 72/4=18х/6=12 = 12*6=72 = 72/6=12х/8=9 = 8*9=72 = 72/8=972/х=72 = 72/72=1 = 72/1=7272/х=1=72/1=72 =72/72=1