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/CONTFRAC X,n,<accuracy> 
calculates n+1 first terms a0,a1,...,an of the continued fraction
presentation
               1
   X = a0 + -----------------
                    1
            a1 + ------------
                        1
                 a2 + -------

                      a3 + ...

of a positive real number X using multiple precision editorial
computing (see MULTIPLE?) with accuracy of <acc> significant
decimal numbers. Default values are n=20, <acc>=1000.
Also 10 first convergents (as ratios) are computed for X.

   A = More on mathematical operations 
   P = More on multiprecision computations