A basket of oranges weighs 45 kilograms including the basket. After selling half of them, there are 25 kilograms left. How many kilograms does the basket weigh?
一筐橘子，连筐重45千克，卖掉一半后还剩25千克，筐重多少千克
<gadget id="calculator">45 - 25</gadget>
<output>20</output>

<gadget id="calculator">25 - 20</gadget>
<output>5</output>

<result>5</result>