Complex Numbers

If \(z_1=2+3 i\) and \(z_2=3+2 i\), where \(i=\sqrt{-1}\), then $$\left[\begin{array}{cc}z_1 & z_2 \\ -\bar{z}_2 & \bar{z}_1\end{array}\right]\left[\begin{array}{cc}\bar{z}_1 & -z_2 \\ \bar{z}_2 & z_1\end{array}\right]$$ is equal to