4/5 X 5/7 X 3/8= 4/8 X 5/5 X 3/7= 1/2 X 3/7= 3/14或者= ( 4 X 5 X 3 ) / ( 5 X 7 X 8 )= 3 / ( 7 X 2 )= 3/14
五分之四乘以七分之五乘以八分之三等于多少？用简便方法计算4/5×5/7×3/8=4/7×3/8=3/14
