First find the total area of the building.
44ft x 74ft = 3256ft^2
Next, since you have 24 tiles per box, each covering 1ft^2 of space, find the number of boxes you need to supply the minimum number of tiles needed to fill the area.
3256ft^2 ÷ 24 = 135.6 boxes
Since you are finding the minimum number of boxes to completely fill the given area, round up.
Answer = 136 boxes