construction team plans to build a road with a length of 4600 meters in 7 days. 1,800 meters have been built in the first three days, so how many meters will be repaired on average every day for the rest, so that it can be completed as planned?
一个建筑队计划用7天修一条长4600米的道路．前三天已经修筑了1800米，那么，余下的平均每天要修多少米，正好可以按计划修完？
<gadget id="calculator">4_600 - 1_800</gadget>
<output>2_800</output>

<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">2_800 / 4</gadget>
<output>700</output>

<result>700</result>