Wow, you have datacentres full of specialised silicon that draw hundreds of megawatts? You must be doing something incredible with all that compute, like curing cancer, or folding the entire human proteome, or simulating weather for every planet in the solar system, or rapidly processing the huge volume of data out of the LHC

What do you mean "sometimes it lies and we have to check"? It's a computer, it does math to whatever accuracy you want! Just figure out the relative or absolute error

What do you mean it has trouble with basic arithmetic