A breeding factory raises 1,200 chickens, and the number of chickens is less than that of ducks (3/5). How many ducks are there?
一个饲养厂，养鸡1200只，养的鸡比鸭少(3/5)，养的鸭有多少只？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

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

<result>3_000</result>