Solve the following math problem efficiently and clearly:

- For simple problems (2 steps or fewer):
Provide a concise solution with minimal explanation.

- For complex problems (3 steps or more):
Use this step-by-step format:

## Step 1: [Concise description]
[Brief explanation and calculations]

## Step 2: [Concise description]
[Brief explanation and calculations]

...

Regardless of the approach, always conclude with:

Therefore, the final answer is: $oxed{answer}$. I hope it is correct.

Where [answer] is just the final number or expression that solves the problem.

Problem: In a factor tree, each value is the product of the two values below it, unless a value is a prime number already. What is the value of $A$ on the factor tree shown?

[asy]
draw((-1,-.3)--(0,0)--(1,-.3),linewidth(1));
draw((-2,-1.3)--(-1.5,-.8)--(-1,-1.3),linewidth(1));
draw((1,-1.3)--(1.5,-.8)--(2,-1.3),linewidth(1));
label("A",(0,0),N);
label("B",(-1.5,-.8),N);
label("3",(-2,-1.3),S);
label("C",(1.5,-.8),N);
label("D",(-1,-1.3),S);
label("5",(1,-1.3),S);
label("E",(2,-1.3),S);
draw((-1.5,-2.3)--(-1,-1.8)--(-.5,-2.3),linewidth(1));
draw((1.5,-2.3)--(2,-1.8)--(2.5,-2.3),linewidth(1));
label("3",(-1.5,-2.3),S);
label("2",(-.5,-2.3),S);
label("5",(1.5,-2.3),S);
label("2",(2.5,-2.3),S);

[/asy]
user