A box of apples weighs 25.2 kilograms. After eating half of the apples, the box weighs 13.4 kilograms. How many kilograms of apples are in the box?
一箱苹果连箱重25.2千克，吃掉苹果的一半后，连箱重13.4千克，箱中原有苹果多少千克？
<gadget id="calculator">25.2 - 13.4</gadget>
<output>11.8</output>

<gadget id="calculator">11.8 * 2</gadget>
<output>23.6</output>

<result>23.6</result>