[Feature] Slide Rule

[LorrMaster]

Slide Rule

- New item: the slide rule
- Use it to complete a large number of mathematical calculations
- Add, subtract, multiply, divide, exponents, roots, trigonometry, logs
- Saves your past 5 previous calculations
- Can type in Ans, Pi, E as variables to use constants or previous answers
- Emag the slide rule for a couple other silly things
- Don't divide by zero

Video: https://www.youtube.com/watch?v=PktlGG7W0kc&t

Branch: https://github.com/goonstation/goonstati...6/pull/190

[Lady Birb]

The effect when you divide by zero is pretty underwhelming, though it can't be too big due to the risk of grief, but it should at least blow up like a zipgun misfire.

[LorrMaster]

The effect when you divide by zero is pretty underwhelming, though it can't be too big due to the risk of grief, but it should at least blow up like a zipgun misfire.

True. Maybe make it create a 2x2 fireball instead?