If the epic poem currently contains 24 lines, the total number of lines added for it to reach 90 is 90-24 = 66 lines.

If a person adds 3 lines to the poem every month, it will take 66/3= 22 months for the poem to contain 90 lines.

# Answer

22
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
The epic poem currently contains 24 lines. If a person adds 3 lines to the poem every month, in how many months will the poem contain 90 lines?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
22
The epic poem currently contains 24 lines. If a person adds 3 lines to the poem every month, in how many months will the poem contain 90 lines?
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