Solution - Simplification or other simple results

Step  1  :

            4
 Simplify   —
            1

Equation at the end of step  1  :

  1
  — • 4
  7

Step  2  :

            1
 Simplify   —
            7

Equation at the end of step  2  :

  1
  — • 4
  7

Step  3  :

Final result :

  4           
  — = 0.57143 
  7