A basket of apples weighs 41.5 kg. After taking out half of the apples, the weight of the basket is 21.5 kg. What is the weight of the basket?
一筐苹果连筐重41.5千克，取出一半苹果后，连筐还重21.5千克，筐重多少千克．
<gadget id="calculator">41.5 - 21.5</gadget>
<output>20</output>

<gadget id="calculator">21.5 - 20</gadget>
<output>1.5</output>

<result>1.5</result>