In a chicken farm, the ratio of roosters to hens is 2:3, and there are 1000 roosters, how many chickens are there in the chicken farm?
鸡场里，公鸡与母鸡的比是2：3，公鸡有1000只，鸡场里共有多少只鸡．
<gadget id="calculator">1_000 / 2</gadget>
<output>500</output>

<gadget id="calculator">500 * 3</gadget>
<output>1_500</output>

<gadget id="calculator">1_000 + 1_500</gadget>
<output>2_500</output>

<result>2_500</result>