The breeding group raised 42 ducks, and the number of ducks raised was half of that of chickens. How many ducks and chickens does the breeding group raise?
饲养小组养了42只鸭，养鸭的只数是鸡的一半．饲养小组养鸭和鸡一共多少只？
<gadget id="calculator">42 * 2</gadget>
<output>84</output>

<gadget id="calculator">42 + 84</gadget>
<output>126</output>

<result>126</result>