A bundle of colored ribbons is 60 meters long, (2/5) is used up, how many meters are left?
一捆彩带长60米，用去了(2/5)，还剩多少米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">60 * (2/5)</gadget>
<output>24</output>

<gadget id="calculator">60 - 24</gadget>
<output>36</output>

<result>36</result>