I am currently working in a language made for the Hypixel Housing gamemode in Minecraft called HSL, which only supports basic arithmetic, namely subtraction, multiplication and division. All numbers are also 64 bit integers, with no strings or fancy operations beside the ones mentioned above.

I’ve been looking for a while and have yet to find any proper basic hashing methods within these guidelines.

I have attempted to get assistance on this through various means such as this gist but have trouble implementing it within the rules I outlined above.