Cristobal read 15 more than three times the pages that Beatrix read. If Beatrix read 704 pages, how many more pages did Cristobal read?
Work out the solution step by step. 
Cristobal read: 15 + 3 * 704 = 2127 pages
2127 - 704 = 1423 pages
Cristobal read 1423 more pages than Beatrix.