help - why is this no work?!

[Shao Sean]

Was doing some geeking with a friend in Finland and he wrote a Perl  
script that got the correct answer and then we discovered that Rev is  
not getting the correct answer for the multiplication.. Where is Rev  
getting the extra "1" from? I have written a 64-bit binary math  
library that gets the correct answer and will need to do further  
testing with it to see if I get the correct answers for all the tests.


Rev: 16777619 * 2166136261 = 36342608889142560

Perl: 16777619 * 2166136261 = 36342608889142559