There are 250 geese in the farm, the number of ducks is twice that of geese, and the number of chickens is 125 less than the total number of geese and ducks. How many chickens are there?
养殖场有250只鹅，鸭的只数是鹅的2倍，鸡的只数比鹅和鸭的总数少125只，鸡有多少只？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">250 * 3</gadget>
<output>750</output>

<gadget id="calculator">750 - 125</gadget>
<output>625</output>

<result>625</result>