Still I don't understand what you are talking about.
To me there is no difference between calculator result and Excel result.
Of course you can't in one situation calculate 2000*6*5.39 (with last factor rounded to two decimals) and in another situation calculate as you do in the Excel file (2000*6* last factor equal to 5,3851648071345) and get the same result.
Don't see PI anywhere in your calculations.
I will stop here.