Solution - Simplification or other simple results

Step  1  :

            3
 Simplify   —
            4

Equation at the end of step  1  :

  12   3
  —— • —
  1    4

Step  2  :

            12
 Simplify   ——
            1 

Equation at the end of step  2  :

       3
  12 • —
       4

Step  3  :

Final result :

  9