
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In the given multiplication, different letters represent different integers ranging from 0 to 9.

G9.1 Find $A$.

G9.2 Find $B$.

G9.3 Find $C$.

G9.4 Find $D$.
```
\begin{array}{l}
\text { A B C D } \\
\begin{array}{r} 
\\
\times \quad 9 \\
\hline \mathrm{D} \mathrm{C} \mathrm{B} \mathrm{A}
\end{array} \\
1 \text { B C } 9 \\
\begin{array}{lllll}
\times & & & & 9 \\
\hline & & & & \\
\hline 9 & \text { C B } & 1
\end{array} \\
\end{array}
```

Present the answer in LaTex format: \boxed{Your answer}
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