The total number of books on four shelves, with 400 books each, is the same as the distance in miles that Karen bikes back to her home from the library. Calculate the total distance that Karen covers if she bikes from her home to the library and back. Let's think step by step and output the final answer after "####".
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If each shelf has 400 books, then the four shelves have 4*400 = 1600 books.
Since the total number of books on the shelves is the same as the distance that Karen bikes back home, biking to and from the library takes 1600+1600 = <<1600+1600=3200>>3200 miles
#### 3200
The total number of books on four shelves, with 400 books each, is the same as the distance in miles that Karen bikes back to her home from the library. Calculate the total distance that Karen covers if she bikes from her home to the library and back.
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