Linear operators and matrices

Consider a linear operator

$$\mathcal{A}\begin{pmatrix}x_1\\x_2\\x_3\end{pmatrix} = \begin{pmatrix}2 x_1\\ 4x_1\\x_1\end{pmatrix} + \begin{pmatrix}8x_2\\7x_2\\5x_2\end{pmatrix} +\begin{pmatrix}0\\4x_3\\2x_3\end{pmatrix}.$$Find the matrix of the operator $\mathcal{A}$ in the standard basis: $e_1 = (1, 0, 0)$, $e_2 = (0, 1, 0)$, $e_3 = (0, 0, 1)$. Write it in the answer field below. Your answer may look as follows:

0 0 0
0 0 0
0 0 0