Some children go to the amusement park. They want to play bumper cars. Each big bumper car can hold $4$ children, while each small bumper car can hold $2$ children. $36$ boys play big bumper cars, and $12$ girls play small bumper cars. Every car is full. How many bumper cars do they need in total?             
Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Multiplication and Division