解:15/8×5/7×5/18等于( 125/336 ) ∵已知需求出15/8×5/7×5/18等于多少 ∴15/8 × 5/7 × 5/18 = 75/56 × 5/18 = (25×3)/56 × 5/(6×3) = (25×5)/(56×6) = 125/336 答:15/8×5/7×5/18等于125/336