rope, 5 meters are cut off for the first time, and the remaining (1/5) is cut off for the second time. At this time, there are still 10 meters left. How many meters is this rope originally?
一条绳子，第一次剪去5米，第二次剪去余下的(1/5)，这时还剩下10米，这条绳子原来有多少米？
<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">10 / (4/5)</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">(25/2) + 5</gadget>
<output>35/2 = around 17.5</output>

<result>35/2 = around 17.5</result>