rope is used up (3/8), and there are 10 meters left, how many meters is the original rope.
一根绳子用去(3/8)，还剩下10米，这要绳子原来有多少米．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">10 / (5/8)</gadget>
<output>16</output>

<result>16</result>