The road repair team planned to build a road of 3.2 kilometers per day and completed it in 45 days. The actual repair was 3.6 kilometers per day, how many days earlier than planned?
修路队修一条公路，计划每天修3.2千米，45天修完，实际每天修3.6千米，比计划提前几天完工？
<gadget id="calculator">45 / 3.6</gadget>
<output>12.5</output>

<gadget id="calculator">3.2 * 12.5</gadget>
<output>40</output>

<gadget id="calculator">45 - 40</gadget>
<output>5</output>

<result>5</result>