A circle with a radius of $3 \mathrm{~cm}$. Find the exact area of the circle shown.

Give your answer as an exact value in terms of $\pi $.
Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: A circle with a radius of $3 \mathrm{~cm}$. Find the exact area of the circle shown.

Give your answer as an exact value in terms of $\pi $.
Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: A circle with a radius of $3 \mathrm{~cm}$. Find the exact area of the circle shown.

Give your answer as an exact value in terms of $\pi $.