A wire is built from Jingzhu Town to Longju Village, which is 7000 meters long. After 4 days of fighting, we were still 600 meters away from Longju Village. How many meters are erected per day on average?
从荆竹镇架一条电线到龙局村，长7000米．架了4天以后，离龙局村还有600米．平均每天架了多少米？
<gadget id="calculator">7_000 - 600</gadget>
<output>6_400</output>

<gadget id="calculator">6_400 / 4</gadget>
<output>1_600</output>

<result>1_600</result>