Cut off (1/5) of a rope, and then connect 8 meters, the result is 60% longer than the original, how many meters is the original length of the rope?
一根绳子剪去(1/5)，再接上8米，结果比原来长60%，绳子原来长多少米．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</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">(3/5) - (4/5)</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>