Solution - Simplification or other simple results

Step  1  :

            1
 Simplify   —
            3

Equation at the end of step  1  :

          1          1
  ((225 • —) • 15) • —
          3          3

Step  2  :

            1
 Simplify   —
            3

Equation at the end of step  2  :

          1          1
  ((225 • —) • 15) • —
          3          3

Step  3  :

Final result :

  375