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.