A road is repaired 75m per day and completed in 20 days. If you want to finish repairing 5 days ahead of schedule, how many meters do you need to repair on average every day? (solution with equation)
一条公路，每天修75m，20天修完．若想提前5天修完，平均每天要修多少米？(用方程解答)
<gadget id="calculator">75 * 20</gadget>
<output>1_500</output>

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

<gadget id="calculator">1_500 / 15</gadget>
<output>100</output>

<result>100</result>