A rope, (1/4) is used for the first time, (1/2) meter is used for the second time, and (1/3) of this rope is used for two times, how many meters is this rope?
一根绳子，第一次用去(1/4)，第二次用去(1/2)米，两次共用去这根绳子的(1/3)，这根绳子长多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<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">(1/3) - (1/4)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/2) / (1/12)</gadget>
<output>6</output>

<result>6</result>