To understand why this is a silly question you need to unpack what is meant by "smarter" and to think about the very complex human/machine culture which we already exist within.
Your calculator and desktop computer, including the applications they run, may be considered forms of weak AI at best. This is because strong AI doesn't yet exist. As such, you can't really extrapolate.
>To understand why this is a silly question you need to unpack what is meant by "smarter" and to think about the very complex human/machine culture which we already exist within.
Ray Kurzweil's opinion is along these lines. I absolutely agree, except that the merging of human and machine intelligence (as is already happening) almost certainly will not preclude the possibility of unsafe AGI being brought into existence.
Smarter is a qualitative difference, not a quantitative. Among other things it is the ability to think of new ideas that no one has ever thought of before.
A calculator, no matter how smart, isn't very scary because it doesn't have much in terms of output (unless it has wi-fi, then it can get to output through internet).
A robotic factory full of saws and robots, or some missile center, etc, is scary even if it has the brains of a calculator because its output capabilities are significant.