Represent $42$ as the sum of $N$ positive real numbers $X_{1}$ , $X_{2}$ , … $X_{N}$ where $N$ is an integer, such that the product, $P$ = $X_{1}$$X_{2}$$…$$X_{N}$ is maximised. Find $\lfloor P \rfloor$ where $\lfloor \rfloor$ is greatest integer function.