A person at Mart has decided that they would like to completely fill the ball bin in the toy section with one type of ball. The ball the stock person decided to use had a radius of 2 m. The ball bin is 3. 2 meters tall and the opening at the top is 1 meters by 1. 5 meters. How many balls should fit inside the bin?

(Hint: Packing spheres in a rectangular prism usually take up 190% of the volume of the spheres