Master Wang made a batch of parts and planned to complete them in 25 days. In fact, I did 5 more every day. As a result, I not only completed the task in 23 days, but also exceeded production by 15. How many parts does Master Wang plan to make every day?
王师傅做一批零件，计划25天完成．实际每天多做5个，结果23天不仅完成了任务，而且超产15个．王师傅计划每天做多少个零件．
<gadget id="calculator">5 * 23</gadget>
<output>115</output>

<gadget id="calculator">115 - 15</gadget>
<output>100</output>

<gadget id="calculator">25 - 23</gadget>
<output>2</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<result>50</result>