Summation based benchmark for calculators

[ijabbott]

Casio fx-4000P
n=1000
t~388s
Result=1395.346288

I used this Dsz loop program which prompts for the number of iterations. The stopwatch was started when the number of iterations was entered at the prompt, '?':

Code:

Rad : ? → A : 0 : Lbl 1 : Ans + ∛ e sin tan⁻¹ A : Dsz A : Goto 1