>>539674730
Easily the most retarded puzzle, you're just expected to randomly fiddle with the keys until you see a number. The game doesn't tell you how many keys you should have, how they should be arranged, how are you expected to use them, when are you expected to use them, or if you even have them all. I was stuck for a while because I was expecting the four keys to be somehow related to the drawer with four cabinets.