I can do 2 digits time 2 digits multiplication in my head with no problem, and occasionaly 3 digits by 2 digits. But doing this kind of calculation takes time and it can be hit and miss, beside I do it just for fun. But what you going to see in this video is different, far different. It sound to me that his brain doing the works differently than the rest of us. We use our brains to perform the task while this savant's brain presenting complete answer after recieving just a single request.

http://video.google.com/videoplay?docid=4913196365903075662