The road from Kunming to Anning with a length of 7312 meters needs to be repaired. It has been repaired for 8 days, and there are 456 meters left to be repaired. How many meters are repaired per day on average?
昆明至安宁一段长7312米的道路需要维修．已经修了8天，还剩456米没修，平均每天修多少米？
<gadget id="calculator">7_312 - 456</gadget>
<output>6_856</output>

<gadget id="calculator">6_856 / 8</gadget>
<output>857</output>

<result>857</result>