A piece of iron wire, if (3/4) of it is used up is 12 meters, if (3/8) of it is used up, how many meters are left.
一根铁丝，用去它的(3/4)是12米，如果用去它的(3/8)，那么还剩多少米．
<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">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

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

<result>10</result>