YAP wrote:
> What is 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF (128 bits) in decimal?  How
> go a head an calculate big numbers like this.

Initialize a sum to 0 and a multiplier to 1.  Start with the right most HEX
digit and multiply it by the multiplier, then add it into the sum.  For each
successive digit to the left, increase the multiplier 16x, multiply the
digit by it, then add it into the sum.

For example:

Sum = 0, mult = 1, HEX digit = F.  SUM <-- 0 + F*1 = 15
Sum = 16, mult = 16, HEX digit = F.  SUM <-- 15 + F*16 = 255
Sum = 255, mult = 256, HEX digit = F.  SUM <-- 255 + F*256 = 4095
..
Keep processing digits in right to left order until all digits exhausted.


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