After a rope is folded in half twice, its length is measured to be 3.5 meters. What is the original length of the rope in meters?
一根绳子对折两次以后，量得它的长度是3.5米，这根绳子原来长度是多少米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3.5 / (1/4)</gadget>
<output>14</output>

<result>14</result>