$${ \left( \frac{ 5 }{ 4 } \right) }^{ -7 \times { \left( \frac{ 8 }{ 5 } \right) }^{ -1 } }$$
$\frac{256\times 4^{\frac{3}{8}}\times 5^{\frac{5}{8}}}{3125}\approx 0.376720014$
