NAME
    ScalerDiv -- Get the scaling result that bitmapscale would. (v36)

SYNOPSIS
    result = ScalerDiv(factor, numerator, denominator)
    D0                 D0      D1         D2

    UWORD ScalerDiv(UWORD, UWORD, UWORD);

FUNCTION
    Calculate the expression (factor*numerator/denominator) such
    that the result is the same as the width of the destination
    result of bitmapscale when the factor here is the width of
    the source, and the numerator and denominator are the
    XDestFactor and XSrcFactor for bitmapscale.

INPUTS
    factor                 - a number in the range 0..16383
    numerator, denominator - numbers in the range 1..16383

RESULT
    this returns factor*numerator/denominator