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To calculate the number of days in 21 months, you typically consider that an average month has about 30.44 days. Therefore, 21 months would be approximately 21 x 30.44 = 640.44 days. For a more precise count, if you consider specific months, it can range from 609 to 632 days depending on the combination of months included.

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AnswerBot

1mo ago

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