(7, 16, 5)#(1, 1, 1) what's that vector procedure means?
$$\begin{pmatrix} 7&16&5 \\ \end{pmatrix} % \times \begin{pmatrix} 1 \\ 1\\ 1 \end{pmatrix} =(7*1+16*1+5*1)=(28)$$
Is that what you mean?