The supermarket sold a total of 330 kilograms of apples on Sunday, bought 15 boxes in the morning, and bought 1.2 times as much in the afternoon. How many kilograms per carton of apples?
超市周日共销售苹果330千克，上午买了15箱，下午买的是上午的1.2倍．每箱苹果多少千克？
<gadget id="calculator">15 * 1.2</gadget>
<output>18</output>

<gadget id="calculator">15 + 18</gadget>
<output>33</output>

<gadget id="calculator">330 / 33</gadget>
<output>10</output>

<result>10</result>