A basket of apples weighs 54.5 kilograms in total. After half of the basket is sold, the weight of the basket is 28.3 kilograms. How much does a basket of apples weigh?
一筐苹果连筐共重54.5千克，卖掉一半后连筐共重28.3千克，一筐苹果有多重？
<gadget id="calculator">54.5 - 28.3</gadget>
<output>26.2</output>

<gadget id="calculator">26.2 * 2</gadget>
<output>52.4</output>

<result>52.4</result>