There are 84 girls in the sixth grade of experimental primary school, and the number of boys is 1 / 4 more than that of girls. The number of sixth grade students accounts for 7 / 36 of the total number of students in the school. How many students are there in the school?
(84 + 84 * (1 + 4 / 1)) / 7 / 36 = 189 / 7 / 36 = 189 * 36 / 7 = 972