And here they go once more with insufficient information to answer the question. Bricks have thickness!
If you apply bricks all across the front of the house, you've already moved the thickness of the bricks along the side, so you need less than 40 metres for the sides, and less again for the back.
Unless, of course, they mean 40 metres on a side before you apply the bricks, and then you end up with the four corners that you need to fill up and again you need to know the depth of the bricks.
Since they don't provide the thickness, I suppose you can do a calculation based on zero-thickness bricks. In that case, the answer is simply 40 * 80 * 4 * 4, converted into words (where the last 4 comes from the fact that each brick has a surface area of 1/4 metre).
By the way, does anyone else notice what a weird house that will be? Looks about like a box of saltines standing on its small end.