Solution - Simplification or other simple results

Step  1  :

             1
 Simplify   ——
            13

Equation at the end of step  1  :

   4    1
  —— • ——
  52   13

Step  2  :

             1
 Simplify   ——
            13

Equation at the end of step  2  :

   1    1
  —— • ——
  13   13

Step  3  :

Final result :

   1            
  ——— = 0.00592 
  169