Query about Question 3 from "PrepSwift: Three Consecutive Integers II" [6800]

GRE GRE Quant Problem Solving
1

https://www.gregmat.com/quizzes/quiz/prepswift-three-consecutive-integers-ii (Question 3)

Can someone help me understand this questions? I am not clear on 3072 logic

2

What do you understand from it?