A, B, and C each process 60 parts at the same time. When A is finished, B will process 50 parts, and C will process 30 parts. According to this calculation, when B completes the work, C is still left behind.
甲、乙、丙三人同时各加工60个零件，当甲完工时，乙加工50个，丙加工30个，照这样计算，乙完工时，丙还差几个没完工．
<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>