A road is 7,200 meters long. After 9 days of repairing, there are still 2,700 meters left to be repaired. How many meters are repaired per day on average?
一条路长7200米，修路工人修了9天，还有2700米没有修，平均每天修多少米？
<gadget id="calculator">7_200 - 2_700</gadget>
<output>4_500</output>

<gadget id="calculator">4_500 / 9</gadget>
<output>500</output>

<result>500</result>