Class Exp

Ive seen people with hundreds of millions of class exp. What am I doing wrong?

https://preview.redd.it/e39xzgrvkhng1.png?width=366&format=png&auto=webp&s=4627e23b88b8eb918bc1d027e588dd88dbfeca8b

https://mrnoodl.idleonefficiency.com/