The factory plans to produce 3,780 water pumps, which will be completed in 36 days. The actual production is 126 units per day, how many days earlier than planned?
工厂计划生产3780台抽水机，36天完成．实际每天生产126台，实际比计划提前几天完成？
<gadget id="calculator">3_780 / 126</gadget>
<output>30</output>

<gadget id="calculator">36 - 30</gadget>
<output>6</output>

<result>6</result>