how do I enter something to the 480th power

Use the  " x^y " key on the calculator or the " ^ " key on the keyboard....

Caution.....the calculator will take small bases to a large power like this......(I think it will handle "e"), but it will balk at raising larger bases to powers like this.

1.03^480

$${{\mathtt{1.03}}}^{{\mathtt{480}}} = {\mathtt{1\,451\,669.855\: \!024\: \!725\: \!862\: \!255\: \!5}}$$