The equation is on top of the elevator door.
- first row: 1,3,5,7,9 = 2
- second row: 4,8,12 = 4
- third row: 1,2,3,4 = 1
- fourth row: (10/2 = 5), (24/3 = 8), (44/4 = 11) = 3
Tap on the keypad on the left and key in 2413.
Elevator opens. Welcome to level 60.