12 carloads of apples are shipped, with an average of 50 boxes per car, and an average of 40 kilograms per box. How many kilograms of apples are shipped in total?
运来12车苹果，平均每车50箱，平均每箱40千克，一共运来苹果多少千克．
<gadget id="calculator">40 * 50 * 12</gadget>
<output>24_000</output>

<result>24_000</result>