Cut a x meter rope in half and then cut half again, leaving 3 meters, what is the original length of the rope?
将一根x米的绳子剪去一半再剪去一半，还剩3米，这根绳子原长多少米米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / (1/2) / (1/2)</gadget>
<output>12</output>

<result>12</result>