Solution - Simplification or other simple results

Step  1  :

            1
 Simplify   —
            3

Equation at the end of step  1  :

  12   1
  —— • —
  56   3

Step  2  :

             3
 Simplify   ——
            14

Equation at the end of step  2  :

   3   1
  —— • —
  14   3

Step  3  :

Final result :

   1           
  —— = 0.07143 
  14