Due to how amazingly inaccurate it is, use it in only if the ellipse length is no bigger than the 90s. Even still, this is still inaccurate so use this: https://www.google.com/search?q=ellipse+circumference+calculator Pi is only 3.14159.
THIS IS DOING IT IN MY HEAD Just to give an example: Their 3.16856 E9 compared with our 2.64513 E9 (a = 53251532 | b = 785698756)