Does anybody knows how to multiply really big numbers in there head?..
I don’t, but some people do: 1) “Mental calculators are people with a prodigious ability in some area of mental calculation, such as multiplying large numbers or factoring large numbers. Some rare mental calculators are autistic savants, with a narrow area of great skill and poor mental development in other directions, but many are people of normal mental development who have simply developed advanced calculating ability. A good many are also experienced scientists, linguists, writers, and so on. Mental calculators were in great demand in research centers such as CERN before the advent of modern electronic calculators and computers. See, for instance, the 1983 book The Great Mental Calculators, whose introduction was written by Hans Eberstark. The world’s best mental calculators are invited every two years to compete for the Mental Calculation World Cup. On July 2nd, 2008, Alberto Coto Garcia of Spain succeeded Robert Fountain of Great Britain as world champion. Michael O’Boyle, an Ame
