Solution - Simplification or other simple results

Step  1  :

            a
 Simplify   —
            b

Equation at the end of step  1  :

  a
  — ÷ c ÷ d
  b

Step  2  :

         a      
 Divide  —  by  c
         b      

Equation at the end of step  2  :

   a
  —— ÷ d
  bc

Step  3  :

          a      
 Divide  ——  by  d
         bc      

Final result :

   a 
  ———
  bcd