For the EXP Multiplier, it's configured to x2, but you can put any wanted number (even float like 2.5).
To change the multiplier change the left part of this line: F23B5FA4 40000000 then apply the code with Select + L.
To find the hex value, in the code editor, do X to open the submenu and open the Converter.
Then you type your value in the Float textbox, and you'll have the hex value in the lower textbox when you've finished.
(Ex: x5: F23B5FA4 40A00000, x10 = F23B5FA4 41200000)