How to find the real value that is encrypted?

[Kingofslavs]

These are gem cost values, but they are encrypted, how can I decrypt them?

The value changes every time I enter a dungeon, but the cost of the gems is the same

Edited June 1 by Kingofslavs

[Kingofslavs]

The decryption key is very far from the encrypted values, I found it using fuzzy search