Solution - Simplification or other simple results

Step  1  :

             8
 Simplify   ——
            39

Equation at the end of step  1  :

         4           8
  (0 -  ——) • (0 -  ——)
        13          39

Step  2  :

             4
 Simplify   ——
            13

Equation at the end of step  2  :

         4    -8
  (0 -  ——) • ——
        13    39

Step  3  :

Final result :

   32           
  ——— = 0.06312 
  507