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: A square is inscribed in the ellipse
\[\frac{x^2}{3} + \frac{y^2}{6} = 1,\]so that its sides are parallel to the coordinate axes.  Find the area of the square.

[asy]
unitsize(1 cm);

draw(xscale(sqrt(3))*yscale(sqrt(6))*Circle((0,0),1));
draw((sqrt(2),sqrt(2))--(-sqrt(2),sqrt(2))--(-sqrt(2),-sqrt(2))--(sqrt(2),-sqrt(2))--cycle);
draw((-2,0)--(2,0));
draw((0,-3)--(0,3));
[/asy]
user