решение дроби 5 5/7*5/12*5 1/4* 6/7:1 1/2 5

40/7 * 5/12 * 21/4 * 6/7 : 11/25 =  9(40*5*21*6 0/ 97*12*4*7)) : 11/25 = ((5*5*3*25)/(7*11)) * 25/11 = (25*3*25)/(7*11) = 1875/77 = 24 27/77