An engineering team wants to repair a 6.6-kilometer road, and 1.2 kilometers have been repaired in the first 3 days. In the future, due to the transfer of workers to participate in other projects, 100 meters will be repaired less every day. How many days will it take to complete this road?
一个工程队要修一条6.6千米长的公路，前3天已经修了1.2千米．以后由于抽调工人参加另外工程，所以每天少修100米，修完这条公路还要几天？
<gadget id="calculator">6.6 - 1.2</gadget>
<output>5.4</output>

<gadget id="calculator">1.2 / 3</gadget>
<output>0.4</output>

<gadget id="calculator">0.4 - 0.1</gadget>
<output>0.3</output>

<gadget id="calculator">5.4 / 0.3</gadget>
<output>18</output>

<result>18</result>