Why the heck does it just say that large numbers are infinity?? That's simply wrong!??
It rounds them to infinity, which it shouldn't be doing ... unless you are dividing one number by a number extremely small in multiplicative comparison. Either way, all calculators have limits, and some will say "math error" if there is a number too big for it to handle, such as \(\pm googol^{\pm 1}\)on some scientific calculators. You are still right - infinity is not the correct answer for anything, as long as it is not 1/0.