(3/4) is cut off from a rope, leaving (3/4) m, what is the original length of the rope in m?
一根绳子剪去(3/4)，还剩下(3/4)m，这根绳子原来长多少m．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/4) / (1/4)</gadget>
<output>3</output>

<result>3</result>