After a rope is cut off (1/5), there are 8 meters left, how long is the rope in meters?
一根绳子截去(1/5)后，还剩8米，这根绳子长多少米．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">8 / (4/5)</gadget>
<output>10</output>

<result>10</result>