A road repair team wants to repair a road. The original plan is to repair 450 meters per day, which can be completed in 12 days. If it is finished in 9 days, how many meters should be repaired every day? (Solve with ratio)
一个修路队要修一条公路，原计划每天修450米，12天可以修完．如果9天修完，每天应修多少米？(用比例解)
<gadget id="calculator">450 * 12</gadget>
<output>5_400</output>

<gadget id="calculator">5_400 / 9</gadget>
<output>600</output>

<result>600</result>