Uncle Li's family raised 42 chickens, and the number of ducks raised was half of the number of chickens. Uncle Li's family raised a total of chickens and ducks.
李大伯家养了42只鸡，养的鸭的只数是鸡的一半．李大伯家一共养鸡、鸭多少只．
<gadget id="calculator">42 / 2</gadget>
<output>21</output>

<gadget id="calculator">21 + 42</gadget>
<output>63</output>

<result>63</result>