Puzzle 9 - Meta Puzzle

Puzzle:“You've seen these numbers before. In puzzle 5. In puzzle 8. But this time, you'll need to go near an old old Puzzle 7, and find a number where the second to the first added to the second over the first over the first leads you to a platform into a magical world.”

[Solution: Teams realize that the “numbers” referred to are primes. They then do 32 + 3/2/2 = 9 ¾ and realize that an “old old Puzzle 7” references the media center puzzle of 2016. Walking around a bit, they find a room labeled 9 ¾ which leads to a hallway with the finish line at the end. ]