A wire is 120 meters long, and (4/5) of it is used up, how many meters are left?
一根铁丝长120米，用去了它的(4/5)，还剩多少米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">120 * (1/5)</gadget>
<output>24</output>

<result>24</result>