The road construction team had to pave 8,500 meters of cement pavement, 2,500 meters in the first week, 4,000 meters in the second week, and the rest of the road was ready to be paved in 4 days. How many meters do you need to pave on average per day?
修路队要铺8500米水泥路面，第一个星期铺了2500米，第二个星期铺了4000米，剩下的路准备4天铺完．平均每天要铺多少米？
<gadget id="calculator">8_500 - 2_500 - 4_000</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 / 4</gadget>
<output>500</output>

<result>500</result>