Abacus against mainframe.

But, in the competition “abacus against computers,” no matter how paradoxical it may sound, the victory was regularly won by the abacus. This was due to the regular inconsistency of part of the annual report, carried out by mainframe computer, with the broad statistical annual report, carried out by the central department of medical statistics

Mathematical nature of the algorithm.

I mastered the multiplication table without memorizing it automatically. Still, by adding to itself the multiplied number in my mind by a certain number of times equal to the multiplier of the product – this was my first algorithm, with which I was able to master the multiplication. I have consciously come to this, and not by the method of automatic cramming.
When, already in high school, I knew that this is exactly how the arithmetic part of the microprocessor works in a computer.