<image> In a school, a reading activity called "Good Books Accompany My Growth" was conducted this year on the May Fourth. To understand the reading situation of 450 students in the eighth grade, a random survey was conducted on 50 eighth-grade students about the number of books they read this semester, and a pie chart was made with the statistical data. How many eighth-grade students in the school have read exactly 3 books? _____ students.