There is a property for dividing the same indices with different bases and it is called power of a quotient rule. It states that the quotient of any two same exponents with different bases is equal to the exponent with quotient of their bases.
Examples. You can use the Power of a Quotient rule for simple, or more complex problems. When you distribute the 3, you get the following: 3^3/a^6. Since 2 * 3 = 6, the exponent with the a will be a 6.