An engineering team repairs a road. It was originally planned to repair 450 meters per day, and it will be completed in 80 days. Now it is required to complete it 20 days ahead of schedule. How many meters should be repaired on average per day?
一个工程队修一条公路，原计划每天修450米，80天完成，现要求提前20天完成，平均每天应修多少米？
<gadget id="calculator">450 * 80</gadget>
<output>36_000</output>

<gadget id="calculator">80 - 20</gadget>
<output>60</output>

<gadget id="calculator">36_000 / 60</gadget>
<output>600</output>

<result>600</result>