The poultry farm raises a total of 4000 chickens and ducks this year, and the number of chickens raised is four times that of ducks. How many chickens does the farm raise this year?
禽类养殖场今年养鸡和鸭共4000只，养的鸡是鸭的4倍，养殖场今年养的鸡是多少只．
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">4_000 / 5</gadget>
<output>800</output>

<gadget id="calculator">4_000 - 800</gadget>
<output>3_200</output>

<result>3_200</result>