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: How many triangles are in the figure below? [asy]
draw((0,0)--(30,0)--(30,20)--(0,20)--cycle);
draw((15,0)--(15,20));
draw((0,0)--(15,20));
draw((15,0)--(0,20));
draw((15,0)--(30,20));
draw((30,0)--(15,20));
draw((0,10)--(30,10));
draw((7.5,0)--(7.5,20));
draw((22.5,0)--(22.5,20));
[/asy]
user