To apply the Product Rule of Exponents, which states that when multiplying two expressions with the same base, you can add their exponents, you can simplify \( 3^3 \cdot 3^2 \) as follows:
\[ 3^3 \cdot 3^2 = 3^{3+2} = 3^5 \]
Therefore, the equivalent simplified expression is \( 3^5 \).