The construction of a 10.8-kilometer-long road was planned to be completed in 15 days, but the task was completed 3 days ahead of schedule. How much more kilometers were actually repaired per day than planned?
修一条长10.8千米的公路，计划15天修完，结果提前3天完成任务，实际每天比计划多修多少千米？
<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">10.8 / 12</gadget>
<output>0.9</output>

<gadget id="calculator">10.8 / 15</gadget>
<output>0.72</output>

<gadget id="calculator">0.9 - 0.72</gadget>
<output>0.18</output>

<result>0.18</result>