A rope is folded in half and then folded in half again. It is found that each fold is 3 meters long. What is the original length of the rope in meters?
一根绳子对折以后再对折，发现每折长3米，绳子原来长多少米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / (1/4)</gadget>
<output>12</output>

<result>12</result>