17. (6 points) In the equation below, what digits do $A$, $B$, $C$, $D$, and $E$ each represent?
$A=$ $\qquad$ , $B=$ $\qquad$ , $C=$ $\qquad$ , $D=$ $\qquad$ , $E=$ $\qquad$ .
$$
\begin{array}{r}
A B C D E \\
\times \quad 4 \\
\hline E D C B A
\end{array}
$$