The workshop processes a batch of parts. The original plan is to process 25 parts per day, which can be completed in 16 days. Actually, 15 more pieces are processed every day, how many days can it actually be completed?
车间加工一批零件，原计划每天加工25个，16天可完工．实际每天多加工15个，实际用多少天可以完工？
<gadget id="calculator">25 + 15</gadget>
<output>40</output>

<gadget id="calculator">16 / 40</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">25 * (2/5)</gadget>
<output>10</output>

<result>10</result>