Evaluate the sum $$1 + \frac{3}{3} + \frac{5}{9} + \frac{7}{27} + \frac{9}{81} + \dotsb$$
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Evaluate the sum $$1 + \frac{3}{3} + \frac{5}{9} + \frac{7}{27} + \frac{9}{81} + \dotsb$$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
3
Evaluate the sum $$1 + \frac{3}{3} + \frac{5}{9} + \frac{7}{27} + \frac{9}{81} + \dotsb$$
train