To process a batch of parts, Master Wang processes 400 pieces per day, and completes them in 25 days. The result is that they are finished 5 days ahead of schedule. How many pieces are processed per day?
加工一批零件，王师傅每天加工400个，25天完成，结果提前5天完成，每天加工多少个？
<gadget id="calculator">400 * 25</gadget>
<output>10_000</output>

<gadget id="calculator">25 - 5</gadget>
<output>20</output>

<gadget id="calculator">10_000 / 20</gadget>
<output>500</output>

<result>500</result>