Problem #PRU-102989

Problems Algebra and arithmetic Arithmetics. Mental maths Set theory and logic Joke problem

Problem

In a bookcase, there are four volumes of the collected works of Astrid Lindgren, with each volume containing 200 pages. A worm who lives on this bookshelf has gnawed its way from the first page of the first volume to the last page of the fourth volume. Through how many pages has the worm gnawed its way through?