Compute the area of the ellipse $9x^2 + y^2 = 36.$
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Compute the area of the ellipse $9x^2 + y^2 = 36.$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
12\pi
Compute the area of the ellipse $9x^2 + y^2 = 36.$
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