Uncle Li's family has 42 chickens, half of which are ducks. How many chickens and ducks do Uncle Li's family raise?

Uncle Li's family has 42 chickens, half of which are ducks. How many chickens and ducks do Uncle Li's family raise?

42 + 42 △ 2 = 42 + 21, = 63. A: Uncle Li's family has 63 chickens and ducks