A wire uses 8m, and there are 32m left, and what is used is the remaining amount.
一根电线用去8m，还剩32m，用去的是剩下的多少．
<gadget id="calculator">8 / 32</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>