Fold a rope in half, then fold it in half and measure its length to 85 cm. How long is the rope in centimeters?
把一根绳子对折，再对折后测量长度是85厘米，这根绳子原来长多少厘米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">85 / (1/4)</gadget>
<output>340</output>

<result>340</result>