A rope is used up (1/5), exactly 6 meters. How long is the rope in meters?
一根绳子用去(1/5)，正好用去6米．绳子全长有多少米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">6 / (1/5)</gadget>
<output>30</output>

<result>30</result>