Yall please help, last question

Reina and Sam are multiplying (8^4)^5 (7^3)^9.
Reina's Work: (8^4)^5 (7^3)^9 = 8^4 + 5^7^3 + 9 = 8^97^12
Sam's Work: (8^4)^5 (7^3)^9 = (8^4)⋅^57^3⋅^9 = 8^207^27