If the matrix \(A\) is such that \(A= \begin{bmatrix} 2\\…

If the matrix \(A\) is such that

\(A= \begin{bmatrix} 2\\ −4\\7\end{bmatrix}\begin{bmatrix}1& 9& 5\end{bmatrix}\)

then the determinant of \(A\) is equal to ______.