Once you have a value displaying as the result of a calculation, to store that value, you go SHIFT then STO then any one of the letters (A, B, C etc.). Then to recall the value, ALPHA then the letter you want. I'm not exactly sure that is right because I don't have my calculator with me. You can use the stored value in expressions (like how you can use ANS in an expression for the next calculation). So it can be helpful if you are doing a long calculation to store the result of a calculation halfway through.
Cooool thanks! Far out does that mean you can save like, 9 numbers? Mean.
[/offtopic]
but since I'm going to be a fresher who's a HSFY I don't want to be attacked since I basically have to walk through Castle St to get to Uni D: