Actually that's a pretty bad calculator, no offense to the creator; it has all the answers programmed in, a real calculator figures the answer out. Of course, most people don't and will never have enough knowledge to create such circuit, so for such person. It's pretty impressive.
@Ace(View Post) But it is INSANELY complex electronics. There are saves like this all over tpt. This is just a demonstration of how insanely amazing level 9 is. If this isn't that great, then other level 9 stuff is beyond imagination. Get what I'm saying.