Assignment:
A large novel is divided into a three volume set. The pages of the novel are numbered consecutively, beginning with page 1 of volume 1 to the last page of volume 3 (in other words, if the last page of volume 1 is 324, then the first page of volume 2 is 325). There are an equal number of pages in each volume. If the sum of the numbers on the first page of each volume is 1281, how many pages does each volume have? What number is the last page of the novel? Explain your reasoning.
Provide complete and step by step solution for the question and show calculations and use formulas.