After one wire is used up (5/8), there are 18 meters left. How long is this wire in meters?
一根铁丝用去(5/8)后，还剩18米，这根铁丝长多少米．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">18 / (3/8)</gadget>
<output>48</output>

<result>48</result>