The road construction team planned to build 1.2 kilometers of road every day, and completed it in 15 days. The actual daily repair was 0.3 kilometers more than the original plan. How many days did it actually take to build the road?
修路队计划每天修路1.2千米，15天完成，实际每天比原计划多修0.3千米．修完这条路实际用了多少天？
<gadget id="calculator">1.2 * 15</gadget>
<output>18</output>

<gadget id="calculator">1.2 + 0.3</gadget>
<output>1.5</output>

<gadget id="calculator">18 / 1.5</gadget>
<output>12</output>

<result>12</result>