11/27×53/42×54/11=11/27×54/11×53/42=2×53/42=53/21
11/27x53/42x54/11=11/27x54/11x53/42=2x53/42=53/21
11/24x53/42x54/11=(11x53x54)/(24x42x11)=(53x3)/(4x14)=159/56
