This is quite a long read, but I read the first part "Introduction to Vedic Mathematics", and as blown away at the methods of recitation used in ancient Indian

This is quite a long read, but I read the first part "Introduction to Vedic Mathematics", and as blown away at the methods of recitation used in ancient Indian to preserve sacred hymns. From what little I've read about Vedic Mathematics, it seems like a powerful way of simplify arithmetic problems involving large numbers by cleverly reducing them to smaller arithmetic sets. The end result makes it a lot easier for the human brain to process. Of course, there's surely a lot more to it I'm sure.