Sum of Reciprocals of Powers as Euler Product/Corollary 1/Examples/Zeta(4) over Zeta(8)

Example of Use of Sum of Reciprocals of Powers as Euler Product/Corollary 1

 * $\ds \prod_{\text {$p$ prime} } \paren {1 + p^{-4} } = \dfrac {105 } {\pi^4}$

where the infinite product runs over the prime numbers.