The cement factory plans to produce 3600 tons of cement, which will be completed in 20 days. The actual daily production is 20 tons more than planned, how many days will the actual task be completed?
水泥厂计划生产水泥3600吨，用20天完成．实际每天比计划多生产20吨，实际多少天完成任务？
<gadget id="calculator">3_600 / 20</gadget>
<output>180</output>

<gadget id="calculator">180 + 20</gadget>
<output>200</output>

<gadget id="calculator">3_600 / 200</gadget>
<output>18</output>

<result>18</result>