Consider the circle on the graph. Its center is at (1,3) and its radius is 6.

Find the equation of the circle in standard form.

Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: Consider the circle on the graph. Its center is at (1,3) and its radius is 6.

Find the equation of the circle in standard form.

Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: Consider the circle on the graph. Its center is at (1,3) and its radius is 6.

Find the equation of the circle in standard form.
