Find the adjoint of the given matrix and verify in each case that

Find the adjoint of the given matrix and verify in each case that $A .(\operatorname{adj} A)=(\operatorname{adj} A)=m|A| . I$.

$\left[\begin{array}{lll}4 & 5 & 3 \\ 1 & 0 & 6 \\ 2 & 7 & 9\end{array}\right]$