There is a box of apples. Take out (2/5) of them and weigh 10 kilograms. How many kilograms does this box of apples weigh?
有一箱苹果，取出其中的(2/5)，称量重10千克，这箱苹果重多少千克？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">10 / (2/5)</gadget>
<output>25</output>

<result>25</result>