James paves a new parking lot.  It is 400 feet by 500 feet.  Only 80% of that is useable for parking.  It takes 10 square feet to park a car.  How many cars can be parked?
The parking lot is 400*500=<<400*500=200000>>200,000
There are 200,000*.8=<<200000*.8=160000>>160,000 square feet of parking space
That means he can park 16,0000/10=16000 cars
#### 16000