The engineering team built a canal, originally planned to build 360 meters per day, and completed it in 30 days. After 10 days of repairing, if you repair 40 meters more every day, how many more days will it take to complete the task?
工程队修一条水渠，原计划每天修360米，30天修完．修10天后，每天多修40米，再修多少天就能完成任务？
<gadget id="calculator">360 * 30</gadget>
<output>10_800</output>

<gadget id="calculator">360 * 10</gadget>
<output>3_600</output>

<gadget id="calculator">10_800 - 3_600</gadget>
<output>7_200</output>

<gadget id="calculator">360 + 40</gadget>
<output>400</output>

<gadget id="calculator">7_200 / 400</gadget>
<output>18</output>

<result>18</result>