Найдите произведение или частное 15*5/6 1:3/7 2/3*12 2/3 :18 8/27*36 10:4/15

15*5/6 = 12 1/2 = 12,5, 1 : 3/7 = 1*7/3=7/3 = 2 1/3, 2/3*12=24/3=8, 2/3 : 18 = 2/3*1/18 = 1/27, 8/27*36=32/3 = 10 2/3, 10:4/15 = 10*15/4 = 150/4 = 37 1/2 = 37,5