There are 120 chickens in Xiaoming's house, which is three times that of ducks. How many more chickens are there than ducks?
小明家有120只鸡，是鸭的3倍，鸡的只数比鸭多多少只？
<gadget id="calculator">120 / 3</gadget>
<output>40</output>

<gadget id="calculator">120 - 40</gadget>
<output>80</output>

<result>80</result>