Where is the EE button on my Casio fx-115es plus calculator

SOURCE: I cant find the EXP or ee button on my casio

the EXP button is the one that says 'x10' next to the 'Ans' key at the bottom.

SOURCE: I need step by step instructions on using Casio fx-115ES ee or exp burron.

The equivalent of the EE or EXP button on the Casio Fx-115ES is marked as x10^X. It is located at the bottom right of the key pad left of the = key.
To enter the power of 10 in a number written in scientific notation, you press the x10^X button followed by the exponent. If the exponent is negative you press the change sign key first [(-)] , then the one or 2 digits in the exponent.
Example Enter the mass of the proton m_p in kilograms
1.6726217 [x10^X] [(-)]27 [=]
In grams the value above is multiplied by 1000.
or 1.6726217 [x10^X] [(-)]24 [=]

Since the calculator has the physical constants (the FX-991ES definititely has them)

1. Display the proton mass in kilograms
2. [SHIFT ][7] to open the constants catalog,
3. type 01 for the proton mass, then press the [x^-1].
4. Divide the result by 1000
5. You should get 5.978638635 x10^23