Multiply by 1-digit numbers: word problems

An apartment has 4 bedrooms. Each bedroom has 3 bookcases. How many bookcases are there in the apartment?

3 × 4 = 12

There are 12 bookcases in the apartment.

Larry's Lawn Care charges 10 bucks to mow the lawn. If Daniel has his lawn mowed 4 times, how much money did he spend?