72: (4*2) 72: 4*2 480: 2*3 480: (2*3) 350: 5*2 350: (5*2)

72:(4*2) = 72 : 8 = 9.
72:4*2 = 72:4 = 18*2 =36

480:2*3 =480:2 = 240 *3 = 720
480:(2*3) = 480 : 6 = 80

350:5*2 = 350 : 5 = 70 * 2 = 140
350:(5*2) = 350 : 10 = 35

1.9
2.36
3.720
4.80
5.140
6.35