Solution - Simplification or other simple results

Step  1  :

            1
 Simplify   —
            3

Equation at the end of step  1  :

  1
  — ÷ 21 ÷ 13
  3

Step  2  :

         1      
 Divide  —  by  21
         3      

Equation at the end of step  2  :

   1
  —— ÷ 13
  63

Step  3  :

          1      
 Divide  ——  by  13
         63      

Final result :

   1            
  ——— = 0.00122 
  819