but, then https://cplusplus.com/reference/climits/To quote a famous American Noble Prize Winner, yes, we can. We've had arbitrary precision calculators for a for a long time.
sh:$ bc 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000+1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 20000000000000000000000000000000000000000000000000000000000000000000\ 00000000000000000000000000000000000000000000000000000000000
And i also have algorithms to calculate large numbers, which will not require permission to use it in my own projects, so not useless.