To simplify the expression \( 7^5 \cdot 7^2 \) using the Product Rule of Exponents, you can add the exponents since the bases are the same.
The Product Rule states:
\[ a^m \cdot a^n = a^{m+n} \]
Applying this rule:
\[ 7^5 \cdot 7^2 = 7^{5+2} = 7^7 \]
Therefore, the simplified expression is:
\[ \boxed{7^7} \]