The school cafeteria bought 22 boxes of apples, each box has 2 layers, each layer has 15 apples, and each 4 apples weighs about 1 kg. How many apples did you buy in total?
学校食堂买了22箱苹果，每箱有2层，每层有15个，每4个苹果约重1千克，一共买了多少个苹果？
<gadget id="calculator">15 * 2 * 22</gadget>
<output>660</output>

<result>660</result>