You can put this solution on YOUR website! * inch diameter
radius = 4 inch
4 inch = 4*0.0254m= 0.1016m
Volume of ball = 4/3 * pi * r^3
Volume = 4/3* 3.14*(0.1016)^3= 0.00439 cu.m
Number of balls = total volume / volume of each ball
Number of balls = 57600/0.00439
=13120729 balls