A basket of apples, including the basket, weighs 51.5 kg. After half of the apples are eaten, the weight of the basket is 26.8 kg. What is the weight of the basket?
一筐苹果，连筐共重51.5千克，吃吃完一半后，连筐共重26.8千克，筐重多少千克．
<gadget id="calculator">51.5 - 26.8</gadget>
<output>24.7</output>

<gadget id="calculator">26.8 - 24.7</gadget>
<output>2.1</output>

<result>2.1</result>