Group Event 8
In the given multiplication, different letters represent different integers whose possible values are $2,4,5,6,7,8$, 9. (Reference: 2000 HI8)
G8.1 Find $A$.
G8.2 Find $B$.
G8.3 Find $C$.
G8.4 Find $D$.
\begin{tabular}{rrrrrrr} 
& 1 & A & B & C & D & E \\
$\times$ & & & & & & 3 \\
\hline & A & B & C & D & E & 1 \\
\hline & 1 & A & B & C & D & 7 \\
$\times$ & & & & & & 3 \\
\hline & A & B & C & D & 7 & 1 \\
\hline & 1 & A & B & C & 5 & 7 \\
$\times$ & & & & & & 3 \\
\hline & A & B & C & 5 & 7 & 1 \\
\hline & 1 & A & B & 8 & 5 & 7 \\
$\times$ & & & & & & 3 \\
\hline & A & B & 8 & 5 & 7 & 1 \\
\hline & 1 & A & 2 & 8 & 5 & 7 \\
$\times$ & & & & & & 3 \\
\hline & A & 2 & 8 & 5 & 7 & 1 \\
\hline & 1 & 4 & 2 & 8 & 5 & 7 \\
$\times$ & & & & & & 3 \\
\hline & 4 & 2 & 8 & 5 & 7 & 1
\end{tabular}