Terrible Calculator

I dug this out of one of my old Redstone worlds and it's probably close to 10 years old. I wasn't really thinking through anything when I was building it nor did I know much about digital logic at the time which resulted in its hulking size and snail speed compared to the number of bits it has.

The inputs are only 4 bits but it does do addition, subtraction, multiplication, and division. It does do decimal places but only .25, .5, and .75 and it kinda randomly rounds to one if it is not exact. The divider unit doesn't look like something I'd make, it's probably from a long lost youtube tutorial and is glitchy and sometimes drops blocks.

It still fully works in 1.21.4 and I think its still kina cool so why not throw it up here.