piece of iron wire is 36 meters long. If you use up the full length (1/6) for the first time and use up the full length (7/12) for the second time, how many meters are left?
一根铁丝长36米，第一次用去全长的(1/6)，第二次用去全长的(7/12)，还剩下多少米？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">(1/6) + (7/12)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">36 * (3/4)</gadget>
<output>27</output>

<gadget id="calculator">36 - 27</gadget>
<output>9</output>

<result>9</result>