Question: A pet store currently has 5 dogs, 2 cats, and 10 birds. How many legs in total do the pets in the store have?
Answer: 
The dogs have 5 dogs * 4 legs/dog = 20 legs.
The cats have 2 cats * 4 legs/cat = 8 legs.
The birds have 10 birds * 2 legs/bird = 20 legs.
The pets have 20 legs + 8 legs + 20 legs = 48 legs.