A rope is cut off (1/6), and then connected to 60 meters, the result is 50% longer than the original. How long is the rope in meters?
一根绳子剪掉(1/6)，再接上60米，结果比原来长50%．绳子原长多少米．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(1/2) - (5/6)</gadget>
<output>-1/3 = around -0.333333</output>

<gadget id="calculator">1 + (-1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 / (2/3)</gadget>
<output>90</output>

<result>90</result>