Two point seven one eight two eight one eight three
is approximately the value of the constant "e".
The sum for n ranging from nought to infinity,
of 1 on n factorial is e.

With compound interest, the more frequently
the compounding's performed you'll watch your balance grow to e.
As the number of periods approaches infinity
the limit of (one plus (one on n)) all to the n is e.

Two point seven one eight two eight one eight three
is approximately the value of the constant "e".
It's one of five constants in The Identity e to the (ipi) plus one is zero, you'll see:

Apologies to any digit-memorisers out there! (I do
say "approximately equal to"...)

Email: fmatrix at danielwedge dot com
Feel free to play this in lectures etc, you have my permission (though I'd be interested to hear from you if you do!)