<human>:  Barbara Blackburn can type 212 words per minute. Due to Carpal tunnel syndrome, Barbara cannot use her left hand for a while so her typing speed is now 40 words less per minute. If she is supposed to type a document with 3440 words, how many minutes will it take her to finish typing the document?
<bot>: How many words can Barbara type per minute? ** Due to carpal tunnel syndrome, Barbara can only type 212 - 40= <<212-40=172>>172 words per minute.
How many minutes will it take Barbara to finish typing the document? ** So, she will be able to finish typing the document in 3440/172 = <<3440/172=20>>20 minutes.
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