Solution - Simplification or other simple results

Step  1  :

            5
 Simplify   —
            9

Equation at the end of step  1  :

         13    5
  (180 • ——) • —
         60    9

Step  2  :

            13
 Simplify   ——
            60

Equation at the end of step  2  :

         13    5
  (180 • ——) • —
         60    9

Step  3  :

Final result :

  65            
  —— = 21.66667 
  3