A batch of fruit is shipped from the fruit shop. The weight of pears is 40kg, which is equivalent to (5/7) of apples. The weight of apples is (2/5) of the total weight of this batch of fruits. (column equation solution)
水果店运来一批水果，梨有40kg，相当于苹果的(5/7)，苹果的重量是这批水果总重量的(2/5)，水果店一共运来水果多少千克？(列方程解答)
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(2/5) * (5/7)</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">40 / (2/7)</gadget>
<output>140</output>

<result>140</result>