The ratio of chickens to ducks is 5:2. If there are 120 chickens, how many ducks are there?
鸡与鸭的只数的比是5：2，鸡有120只，鸭有多少只．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">120 / (5/2)</gadget>
<output>48</output>

<result>48</result>