Converts numbers to continued fractions and back again. A solver for Pell's Equation is provided. The method for calculating roots in continued fraction form is provided without published attribution in such places as Professor Emeritus Jonathan Lubin, < http://www.math.brown.edu/jlubin/> and his post to StackOverflow, < https://math.stackexchange.com/questions/2215918> , or Professor Ron Knott, e.g., < https://r-knott.surrey.ac.uk/Fibonacci/cfINTRO.html> .