She completes 30 hours/week / 3 hours/painting = <<30/3=10>>10 paintings/week

So in one month, she paints 10 paintings/week * 4 weeks/month = <<10*4=40>>40 paintings

# Answer

40
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
An artist spends 30 hours every week painting. If it takes her 3 hours to complete a painting, how many paintings can she make in four weeks?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
40
An artist spends 30 hours every week painting. If it takes her 3 hours to complete a painting, how many paintings can she make in four weeks?
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