A 24m iron wire, (1/3) is used for the first time, and (1/4) is used for the second time, how many meters are left.
一根24m的铁丝，第一次用去它的(1/3)，第二次用去(1/4)，还剩多少米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">24 * (5/12)</gadget>
<output>10</output>

<result>10</result>