Solution - Simplification or other simple results

Step  1  :

            10
 Simplify   ——
            11

Equation at the end of step  1  :

   1   3    10
  (— • —) • ——
   5   7    11

Step  2  :

            3
 Simplify   —
            7

Equation at the end of step  2  :

   1   3    10
  (— • —) • ——
   5   7    11

Step  3  :

            1
 Simplify   —
            5

Equation at the end of step  3  :

   1   3    10
  (— • —) • ——
   5   7    11

Step  4  :

Final result :

   6           
  —— = 0.07792 
  77