A basket of apples weighs 36 kilograms, and after half of them are sold, the weight of the basket is 20 kilograms. How many kilograms of apples are there?
一筐苹果连筐重36千克，卖去一半后连筐重20千克，原来苹果有多少千克？
<gadget id="calculator">36 - 20</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<result>32</result>