The engineering team built a road. On the first day, 2.5 kilometers were repaired, and on the second day, the repair was 1.2 times that of the first day. How many kilometers did you repair less on the first day than on the second day?
工程队修一条路．第一天修了2.5千米，第二天修的是第一天的1.2倍．第一天比第二天少修了多少千米？
<gadget id="calculator">2.5 * 1.2</gadget>
<output>3</output>

<gadget id="calculator">3 - 2.5</gadget>
<output>0.5</output>

<result>0.5</result>