The document discusses how ancient Hindu manuscripts contained advanced scientific knowledge, including accurate calculations of pi up to 28 digits. It describes the Katapayadi numerical system used in Sanskrit to represent numbers in a mnemonic way using letters. A sloka from the Rig Veda is shown to give the value of pi to 28 digits through its technical translation, far more accurate than Western mathematicians could achieve until computers. Further, it explains how other ancient Sanskrit texts like the Sad-ratna-mālā also encoded the value of pi within verses using this numerical system, demonstrating sophisticated mathematical knowledge existed in ancient India.