\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Consider the matrix \(\mathbf{C}\) defined as:$$ \mathbf{C}=\begin{pmatrix}\pi&1 \\ -1&0 \\ 7&\sqrt{3} \end{pmatrix} $$What is the value of the entry \(c_{31}\)?
\(c_{31}=\)