batch of parts can be completed by 25 workers in 20 days. Now want to finish it in 10 days, how many workers are needed?
一批零件，25个工人20天可以完成．现在想用10天时间完成，需要多少个工人？
<gadget id="calculator">1 / 20 / 25</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">1 / (1/500) / 10</gadget>
<output>50</output>

<result>50</result>