Let $A_1 \in \mathbb{C}^{N_1 \times N_2}, A_2 \in \mathbb{C}^{N_2 \times N_3}, \ldots, A_M \in \mathbb{C}^{N_M \times N_{M + 1}}$ each be a D999: Complex matrix.
Then
\begin{equation}
\left( \prod_{m = 1}^M A_m \right)
= \prod_{m = 1}^M A^T_{M + 1 - m}
\end{equation}