314×517×2213=?3\frac14\times5\frac17\times2\frac{2}{13} =?341×571×2132=?
(23+12)÷(23−12)÷7=?(\frac23+\frac12)\div(\frac23-\frac12)\div7=?(32+21)÷(32−21)÷7=?