A truck pulls 480 boxes of food, and after delivering them to 15 retail outlets, there are still 15 boxes left. How many boxes of food are delivered to each retail outlet on average?
一辆货车拉了480箱食品，送到15个零售点后，还剩下15箱，平均每个零售点送了几箱食品？
<gadget id="calculator">480 - 15</gadget>
<output>465</output>

<gadget id="calculator">465 / 15</gadget>
<output>31</output>

<result>31</result>