Xiaoming's family raised 42 chickens, and the ducks they raised were half of the chickens. How many chickens and ducks does Xiao Ming raise in total?
小明家养了42只鸡，养的鸭是鸡的一半．小明家养鸡鸭一共有多少只？
<gadget id="calculator">42 / 2</gadget>
<output>21</output>

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

<result>63</result>