Question 560288
volume of wall / volume of each brick = number of bricks

Volume of wall = 8m*6m *22.5 m =1080 m^3

Volume of each brick =  25cm*11.25cm*6cm 
convert to meters
0.25*0.1125*0.06=0.0016875 m^3

1 080 / 0.0016875 = 640,000 bricks