Solution - Simplification or other simple results

Step  1  :

            21
 Simplify   ——
            4 

Equation at the end of step  1  :

        2          21
  (0 -  —) • (0 -  ——)
        7          4 

Step  2  :

            2
 Simplify   —
            7

Equation at the end of step  2  :

        2    -21
  (0 -  —) • ———
        7     4 

Step  3  :

Final result :

  3           
  — = 1.50000 
  2