There are 2,650 chickens, ducks, and geese in the farm, including 628 chickens and 1,020 ducks. How many geese are there?
饲养场有鸡、鸭、鹅共2650只，其中鸡有628只，鸭有1020只，鹅有多少只？
<gadget id="calculator">2_650 - 628 - 1_020</gadget>
<output>1_002</output>

<result>1_002</result>