9*3:6

Let's clarify the expression: Is it 9 * 3 : 6, which involves multiplication and division?

If so, assuming the operations are multiplication (*) and division (:), and following the order from left to right:

9 * 3 = 27
Then, 27 : 6 = 4.5

Answer: 4.5

If you meant something different, please let me know!