Question

Reed uses 8 pieces of glass per square foot to make a stained glass window. How many pieces of glass will he need to make a window that is 864864 square inches?

Answer 1

First you need to know how many square feet that is, 864864/12
That means there are 72072 Square feet.
Finally you need to multiply the square feet by the pieces of glass required. 72072*8
Answer being:  576576