How many bricks will be required for a wall which is $8\;m$ long $6\;m$ high and $22.5 \;cm$ thick if each bricks measures $25\;cm \times 11.25\;cm \times 6\;cm$?

Question

$\begin{array}{1 1} 6400 \\ 6200 \\ 6000 \\ 6300 \end{array} $