The factory planned to produce 500 parts, but actually produced 600 parts. How much is the overproduction?
工厂计划生产500个零件，实际生产600个，超产多少．
<gadget id="calculator">600 - 500</gadget>
<output>100</output>

<gadget id="calculator">100 / 500</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>