Type the correct answer in the box. Use numerals instead of words. If necessary, use \( / \) for the fraction bar. Wendy is arranging books on the bookshelves in the school library. The total number of books she arranges is given by the equation \( b=12 r \), where \( b \) is the total number of books and \( r \) is the number of rows. Each row contains the same number of books. If Wendy arranged 16 rows, she arranged a total of