A figure with a radius of $ 5 \mathrm{~mm}$. Find the exact area of the given figure:
Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: A figure with a radius of $ 5 \mathrm{~mm}$. Find the exact area of the given figure:
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 figure with a radius of $ 5 \mathrm{~mm}$. Find the exact area of the given figure: