To build a road, it is planned to build 15.6 meters per day, and it will be completed in 20 days. Due to the urgency of the task, it must be completed 5 days in advance, so how many meters will be repaired on average per day?
修一条公路，计划每天修15.6米，20天修完．由于任务紧急，必须提前5天完成，那么平均每天多修多少米？
<gadget id="calculator">15.6 * 20</gadget>
<output>312</output>

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

<gadget id="calculator">312 / 15</gadget>
<output>104/5 = around 20.8</output>

<gadget id="calculator">(104/5) - 15.6</gadget>
<output>5.2</output>

<result>5.2</result>