The large gearwheels are no longer blocked. You can see the digits in one of the small windows beside the gearwheels and the letters on the opposite side. Each digit or symbol corresponds to a letter. This is a decoder. To use it, you have to find a code.

The code is hidden on the movable object inside the eye. You should tilt the box sideways to see it.

Here is the explanation of how to decode the first 4 symbols using the decoder. First you can see the symbols: △5=7. It is best to write them down.

On the gear wheel with the numbers you put the symbol △. This corresponds to the letter S, which you can see in the window on the opposite side. The digit 5 stands for the letter T.

Finally you should get the word «STAR». This is the clue to the final step.