Master Xiao Wang processes a batch of parts. He plans to process 40 parts per day, which can be completed in 27 days, but actually processes 45 parts per day. How many days can it be completed in advance?
小王师傅加工一批零件，计划每天加工40个，27天可以完成，但实际每天加工45个，这样可以提前几天完成？
<gadget id="calculator">27 / 45</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">40 * (3/5)</gadget>
<output>24</output>

<gadget id="calculator">27 - 24</gadget>
<output>3</output>

<result>3</result>