A box of apples weighs 25 kg. The weight of an apple after eating half is 13 kg. If the price per kilogram is 12 yuan. How much does it cost to buy this box of apples?
一箱苹果连盒子共重25千克．吃了一半苹果后的重量为13千克．如果每千克售价12元钱．买这箱苹果共要花多少元钱？
<gadget id="calculator">25 - 13</gadget>
<output>12</output>

<gadget id="calculator">12 * 2 * 12</gadget>
<output>288</output>

<result>288</result>