There are 500 chickens in the farm, and ducks are 120% of chickens. How many ducks are there?
饲养场有鸡500只，鸭是鸡的120%，鸭有多少只？
<gadget id="calculator">120 / 100</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">500 * (6/5)</gadget>
<output>600</output>

<result>600</result>