4целых*1целая 1/2 2 целых 3/8*6целых 3целых*2целых 1/9

1) 4/1 * 1 1/2 = 4/1 * 3/2 = 6
2) 2 3/8 * 6/1 = 19/8 * 6/1 = 57/2 = 28 1/2
3) 3 * 2 1/9 = 3/1 * 19/3 = 19/3 = 6 1/3