A pile of sand, (3/8) of which has been transported away, is exactly 24 tons, how many tons are left untransported.
一堆沙，运走了它的(3/8)，正好是24吨，还剩多少吨未运．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">24 / (3/8)</gadget>
<output>64</output>

<gadget id="calculator">64 - 24</gadget>
<output>40</output>

<result>40</result>