Solution - Simplification or other simple results

Step  1  :

            4
 Simplify   —
            5

Equation at the end of step  1  :

  4
  — ÷ 5 ÷ 9
  5

Step  2  :

         4      
 Divide  —  by  5
         5      

Equation at the end of step  2  :

   4
  —— ÷ 9
  25

Step  3  :

          4      
 Divide  ——  by  9
         25      

Final result :

   4            
  ——— = 0.01778 
  225