There’s lots of crackpots on the internet (and off the internet) who don’t understand some of the basics in mathematics. This person claims that:
“In 4,000 years of mathematics no one has been able to show a ratio for pi. We will show just how to produce that ratio. They state that pi is the ratio of the circumference of a circle to its diameter and then go on to prove that there is no ratio. Therefore concluding that the ratio is only a mere approximation of a true value. You will be surprised about how to establish a ratio for pi as well as how to prove that the present day calculation for pi is invalid.”
They later go on to prove that pi = 201 / 64 by using “addition – subtraction – multiplication – division and square root extraction”.
Located at PureMathTheory.com.