To apply the Power Rule of Exponents, which states that \((a^m)^n = a^{m \cdot n}\), we need to simplify the expression \((10^9)^7\).
Applying the Power Rule:
\[ (10^9)^7 = 10^{9 \cdot 7} = 10^{63} \]
Therefore, the correct option that uses the Power Rule of Exponents correctly is:
10^63