In addition to what @Salih Jawad has importantly observed, there is a bit more to add. This is an important topic, which is amazing when one considers the simplicity of pi itself, its origins and the thinking that it has inspired.
The simplicity of pi can be seen in the attached image from
https://www.mathsisfun.com/numbers/pi.html
Origin of pi: The symbol π was devised by British mathematician William Jones in 1706 to represent the ratio and was later popularized by Swiss mathematician Leonhard Euler. Because pi is irrational (not equal to the ratio of any two whole numbers), its digits do not repeat, and an approximation such as 22/7 is often used for everyday calculations. To 39 decimal places, pi is 3.141592653589793238462643383279502884197. From the Encylopedia Brittanica:
https://www.britannica.com/science/pi-mathematics
Pi Day is celebrated on March 14th. Pi has been calculated to over one trillion digits beyond its decimal point. From