A bag of flour weighs 60kg and has been eaten (3/5), how many kilograms are left.
一袋面粉重60kg，已经吃了(3/5)，还剩下多少kg．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

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

<result>24</result>