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: When a car's brakes are applied, it travels 7 feet less in each  second than the previous second until it comes to a complete stop.  A car goes 28 feet in the first second after the brakes are applied.  How many feet does the car travel from the time the  brakes are applied to the time the car stops?
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