A 1200-meter-long rope, its (1/6) was used for the first time, and its (1/4) was used for the second time, how many meters is this rope shorter?
一根长1200米的绳子，第一次用了它的(1/6)，第二次又用去它的(1/4)，这根绳子短了多少米？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">(1/6) + (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1_200 * (5/12)</gadget>
<output>500</output>

<result>500</result>