Multiplies the fractions a_n/a_d and b_n/b_d and stores the result in res_n and res_d.
Numerator of first value
Denominator of first value
Numerator of second value
Denominator of second value
Pointer to gint to hold the result numerator
Pointer to gint to hold the result denominator
FALSE on overflow, TRUE otherwise.
Multiplies the fractions a_n/a_d and b_n/b_d and stores the result in res_n and res_d.