The number of ducks raised in the farm is 1200, which is less than the number of chickens (2/5). How many chickens are raised in the farm?
饲养场养鸭1200只，比养鸡的只数少(2/5)，饲养场养鸡多少只？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1_200 / (3/5)</gadget>
<output>2_000</output>

<result>2_000</result>