Solution - Simplification or other simple results

Step  1  :

             4
 Simplify   ——
            21

Equation at the end of step  1  :

   6   14     4
  (— • ——) • ——
   7   2     21

Step  2  :

            7
 Simplify   —
            1

Equation at the end of step  2  :

   6         4
  (— • 7) • ——
   7        21

Step  3  :

            6
 Simplify   —
            7

Equation at the end of step  3  :

   6         4
  (— • 7) • ——
   7        21

Step  4  :

Final result :

  8           
  — = 1.14286 
  7