The power rule of exponents states that when you raise a power to another power, you multiply the exponents. However, in this case, since \( 7^{15} \) is already in a simplified exponential form, it doesn't require addition or multiplication of exponents.
If you were to express \( 7^{15} \) in terms of a product of the base, it would be:
\[ 7^{15} = 7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 \times 7 \]
So, \( 7^{15} \) can be written out as the base \( 7 \) multiplied by itself a total of 15 times.
If you meant to express it differently (for example, as a power of a smaller number), please clarify your question!