JoJa 84 Plus Ingame calculator
JoJa 84 plus is a simple mod for Stardew Valley that allows you to make computations without having to Alt+Tab out of the game.
Simply download and extract the .zip file into your mods folder. Note: SMAPI is required.
To open the calculator, press F5. From there you can use the on-screen number pad or the one on your keyboard to preform basic calculations. Enjoy!
If you find any bugs, feel free to report them on GitHub!