Help System (web edition)

MAT C=#INTSCAL(A,n)
rescales the columns of A to integers by first evaluating each element
as the n'th convergent of a continued fraction expansion of A (default
n=10) and then finding the least common multiple of denominators.
If A is a numerical constant or a 1x1 matrix,
MAT C=#INTSCAL(A,n)
evaluates continued fractions of A for up to n terms (default n=10)
and saves both partial quotients and convergents etc. in a matrix
file C.
MAT D=#FRAC_TO_DEC(C)
converts a continued fraction, represented by its partial quotients,
and saved as the first column of matrix C, to a decimal number.

A = More about additional MAT #operations 
M = More about MAT operations