The fruit wholesale market brings in 890kg of apples, and after 3 days of selling there are 50kg left. How many kilograms of apples are sold per day on average?
水果批发市场运进苹果890kg，卖了3天后还剩50kg，平均每天卖出苹果多少千克？
<gadget id="calculator">890 - 50</gadget>
<output>840</output>

<gadget id="calculator">840 / 3</gadget>
<output>280</output>

<result>280</result>