The fruit tree team sprayed 6,000 trees. After 4 days of spraying, there are still 3,500 trees left. How many trees are sprayed on average every day?
果树队给6000棵树喷药，喷了4天后，还剩下3500棵没喷完，平均每天喷多少棵？
<gadget id="calculator">6_000 - 3_500</gadget>
<output>2_500</output>

<gadget id="calculator">2_500 / 4</gadget>
<output>625</output>

<result>625</result>