very newbie questions

[AquaRock7]

How do you write an exponent sign in python (ie how do u write 16 x 16 in
exponential form?)

WHat does the '%' operation do?

One more thing...  How do you turn a string into numerical data to do math on
(I have to use the raw_input() command, b/c they enter a # in hexadecimal) then
turn the numerical data back into a string?

Please reply to
dustin at getzfamily.inbox.as

Thanks!
Dustin