If (3/4) of a rope is used, exactly 12 meters will be used. If (5/8) of it is used, how many meters will be used.
一根绳子，用去它的(3/4)，正好用去12米，如果去它的(5/8)，那么用去多少米．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">12 / (3/4)</gadget>
<output>16</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">16 * (5/8)</gadget>
<output>10</output>

<result>10</result>