Build a road and plan to finish it in 15 days. As the road construction team repaired less than 2.5 meters every day, it took 20 days to complete the task. How many meters do you actually repair every day?
修一条路，计划15天修完．由于修路队每天少修2.5米，结果20天才完成任务．实际每天修多少米？
<gadget id="calculator">2.5 * 15</gadget>
<output>37.5</output>

<gadget id="calculator">20 - 15</gadget>
<output>5</output>

<gadget id="calculator">37.5 / 5</gadget>
<output>7.5</output>

<result>7.5</result>