The road repair team needs to repair a section of road, 2.2km a day, and it can be completed in 15 days. If an extra 0.8km is repaired every day, how many days can it be completed?
修路队要修一段公路，每天修2.2km，15天可以修完，如果每天多修0.8km，多少天可以修完？
<gadget id="calculator">2.2 * 15</gadget>
<output>33</output>

<gadget id="calculator">2.2 + 0.8</gadget>
<output>3</output>

<gadget id="calculator">33 / 3</gadget>
<output>11</output>

<result>11</result>