Uncle Li's family has 60 chickens, and the number of ducks is half of the chickens. How many chickens and ducks does Uncle Li's family raise?
李伯伯家养了60只鸡，养鸭的只数是鸡的一半．李伯伯家一共养鸡、鸭多少只？
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">60 + 30</gadget>
<output>90</output>

<result>90</result>