Question: The employees of Google went on a day trip. 4 buses were rented that have the capacity of holding 60 employees. 6 minibusses that can hold 30 employees, and 10 minivans that can hold 15 employees. How many employees can join the day trip?
Solve this problem. 
Answer: 
60 x 4 = 240 employees can ride on the bus.
30 x 6 = 180 employees can ride on the minibusses.
15 x 10 = 150 employees can ride on the minivans.
Therefore 240 + 180 + 150 = 570 employees can join the day trip.