A piece of wire is cut (1/5) and then connected to 6 meters, the result is longer than the original (2/5), what is the length of the original wire in meters?
一段电线截取(1/5)后再接上6米，结果比原来长(2/5)，原来的电线长是多少米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(2/5) + (1/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">6 / (3/5)</gadget>
<output>10</output>

<result>10</result>