Fold a rope in half, fold it in half, and fold it in half again. The length of each folded rope is 0.5 meters. What is the original length of the rope in meters?
把一根绳子对折，对折再对折，每一折绳子的长是0.5米，这根绳子原来的长是多少米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">0.5 / (1/4)</gadget>
<output>2</output>

<result>2</result>