Multiplication strategy

Today Miss Scott did some maths testing with me. She did it to see how much I had learnt. She did stuff like multiplication, division and fractions.

Here is the question I had to solve. 
"At a car factor they had 72 wheels and each car needs 4 wheels. How many cars can they make?"

Here is my strategy:

72 / 4 =?
4 x ___ = 72 

4x8= 32
4x10=40
40+32=72
8+10=18

That's how I got my answer.