Solution - Simplification or other simple results

Step  1  :

            1
 Simplify   —
            9

Equation at the end of step  1  :

  1
  — ÷ 5 ÷ 4
  9

Step  2  :

         1      
 Divide  —  by  5
         9      

Equation at the end of step  2  :

   1
  —— ÷ 4
  45

Step  3  :

          1      
 Divide  ——  by  4
         45      

Final result :

   1            
  ——— = 0.00556 
  180