The shift happens..........................when u pair 3 with four....................pi is between 3 and 4..............e is just under it............................at 2.7...........different parts of the math cannon that seem to have nothing to do with each other.......................................

e (Euler's Number)

The number e is a famous irrational number, and is one of the most important numbers in mathematics.
The first few digits are:

2.7182818284590452353602874713527 (and more ...)

It is often called Euler's number after Leonhard Euler.
And Euler is spoken like "Oiler".

e is the base of the Natural Logarithms (invented by John Napier).