The master worker processes the parts. Originally planned to make 40 parts a day, it was completed in 5 days, but the task was actually completed in 4 days. How many more parts should be processed every day than the original plan?
工人师傅加工零件，原计划每天做40个零件，5天做完，实际4天就完成了任务，实际每天要比原计划每天多加工多少个零件？
<gadget id="calculator">40 * 5</gadget>
<output>200</output>

<gadget id="calculator">200 / 4</gadget>
<output>50</output>

<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<result>10</result>