Do you find some mathematical activities useless?

[Maximilian Hohmann]

(04-01-2018 07:29 PM)pier4r Wrote:  Wait a moment.

I think you got me wrong :-) What I was trying to say is that if my bank account saldo (or paycheck balance) is as long as the last currently known decimal of pi then I certainly don't need to worry about completing my collection of HP calculators. I would just buy every calculator museum on this globe...