A breeding factory raises 1,200 ducks and raises fewer chickens (3/5) than ducks. How many chickens are there?
一个饲养厂，养鸭1200只，养的鸡比鸭少(3/5)，养的鸡有多少只？
<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>480</output>

<result>480</result>