Solution - Simplification or other simple results

Step  1  :

            10
 Simplify   ——
            21

Equation at the end of step  1  :

   3   10
  —— • ——
  22   21

Step  2  :

             3
 Simplify   ——
            22

Equation at the end of step  2  :

   3   10
  —— • ——
  22   21

Step  3  :

Final result :

   5           
  —— = 0.06494 
  77