The construction of a section of railway was planned to be completed in 20 days, and 0.54 km was repaired per day, but the task was actually completed in only 18 days. How many kilometers was actually repaired on average per day?
修一段铁路，计划20天完成，每天修0.54千米，实际只用18天就完成了任务，实际平均每天修多少千米？
<gadget id="calculator">0.54 / 18</gadget>
<output>0.03</output>

<gadget id="calculator">20 * 0.03</gadget>
<output>0.6</output>

<result>0.6</result>