解:872除以3约等于( 290.67 ) ∵已知需求出872除以3等于多少 X ÷ Y = X / Y = Z ∴872除以3 = 872 ÷ 3 = 872 × 1/3 = 872/3 = 290.6666667 ≈ 290.67 答:872除以3约等于290.67