Rosala it was good that you thought of that other thread.
This is very confusing and in my opinion is is very bad notation but
If I enter 10000e^-2.835 into the web2.0calc this is what I get.
$${\mathtt{10\,000}}{\mathtt{\,\times\,}}{{\mathtt{e}}}^{-{\mathtt{2.835}}} = {\mathtt{587.185\: \!258\: \!338\: \!722\: \!9}}$$
But if i enter this 10000e-2.835 Without the ^ lets see what happens.
Nothing - NO on this site calc I cannot bring it up as anything other than what it is here.
On many calculators you use the EXP button to bring up 10 to the power of.
And according to the other mathematician some calculators drop the XP and just use E to mean 10^
It is very confusing. 
