Given 
A cylindrical bin with a diameter of 15 feet 3 inches and a height of 24 feet 4 inches is used to hold wheat.
One cubic foot holds 0.804 bushels
Find out bushels of wheat can be stored.
To proof
Formula 

where r is the radius and h represent the height.
As given in the question
 diameter = 15 feet 3 inches 
height = 24 feet 4 inches 
First convert inches into feet
I inches = 0.083 feet
15 feet 3 inches = 15 + 3 × 0.083
                           =    15.25 feet
Diameter = 15.25 feet
24 feet 4 inches = 24  + 4 ×0.083
                            = 24.33 feet
Height = 24.33 feet

Radius = 7.63 feet

Put all the value in the above formula.
we get
Volume of the cylinder = 3.14× 7.63× 7.63× 24.33
                                       = 4447.55 foot³ ( approx)
As given
One cubic foot holds 0.804 bushels
 Total bushels of wheat can be stored = 4447.55×0.804 
                                                                = 3575.83 ( approx)
Total bhushels of wheat stored are  3575.83 ( approx).
Hence proved