The school cafeteria transported 500 kilograms of coal, and 325 kilograms remained after burning for 7 days. How many kilograms of coal are burned on average every day?
学校食堂运进500千克煤，烧了7天还剩325千克，平均每天烧煤多少千克？
<gadget id="calculator">500 - 325</gadget>
<output>175</output>

<gadget id="calculator">175 / 7</gadget>
<output>25</output>

<result>25</result>