The formula for the area of a circle is:

$\text{Area} = \pi * \text{(Radius)}^{2}$

The radius is the distance from the center of the circle to the edge:
In this problem, the radius of the circle is $2$
To find the area of the circle, square the radius:
$2^{2} = 4$
Now multiply by $\pi$. The number $\pi$ is approximately equal to 3.14.
$\text{Area} = \pi * \text{(Radius)}^{2}$
$\text{Area} = 3.14 * 4$
$\text{Area} = 12.56$