Fold a rope in half and then in half again. At this time, the length of each folded rope is 5 meters. How long is this rope?
把一根绳子对折后再对折，这时每折绳子长5米．这根绳子原来长多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">5 / (1/4)</gadget>
<output>20</output>

<result>20</result>