Many bricks must be purchased to build a wall MATH HELP PLEASE?

Question

Solid brick construction involves a double layer of bricks with an air space in between. Every 6th row has one brick set long ways and the next set across so that it joins the other wall. If each brick is 270 mm long, 30 mm high, 20 mm wide and each mortared section is 9 mm wide, how many bricks must be purchased to build a wall 10 m high and 10 m long?

Answer 1

Sorry!  My daughter has been swamped with algebra homework the whole first week of school, and I couldnt help her either :(