Order of operations

PEMDAS

parentheses

exponents

multiplication and division

addition and subtraction

when two operations are of the same rank they are done left to right.

So first do parentheses leaving you...

6 divided by 2(3)

since the only thing left is multiplication and division you now go left to right.

six divided by 2 = 3

and three times three = nine.

The confusion seems to be from the fact that people believe that each individual letter of PEMDAS is done in that order. In which case multiplication would come before the division. But this is not so. Multiplication and division is done left to right.