To simplify the expression \( 7^5 \cdot 7^2 \) using the Product Rule of Exponents, you can add the exponents when multiplying like bases. The Product Rule states that:
\[ a^m \cdot a^n = a^{m+n} \]
In this case, we have:
\[ 7^5 \cdot 7^2 = 7^{5+2} = 7^7 \]
So, the simplified expression is:
\[ 7^7 \]