A rope, cut off (1/5) for the first time, cut off 2 meters for the second time, and there are 6 meters left, how long is the rope?
一根绳子，第一次截去它的(1/5)，第二次截去2米，还剩下6米，这根绳子长多少米？
<gadget id="calculator">2 + 6</gadget>
<output>8</output>

<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>