Buy for only 99 cents Easy Calculator from Amazon here:
http://www.amazon.com/Easy-Calculato...8327308&sr=1-1
When you open it, it shows all the numbers associated with the top row of letters in large fonts. Do a few calculations and you will have memorized it. When using numbers without the Calculator active, just use the <ALT> key with the letter.
That calculator is great to have anyway just in case you need it. All functions work fine except for the Exponent function.