Simplify : $ \large\frac{25 \times t^{-4}}{5^{-3} \times 10 \times t^{-8}}$

Question

$\begin{array}{1 1} 5^4t^4 \\ \large\frac{t^4}{2} \\ \large\frac{t^8}{5} \\ \large\frac{625\;t^4}{2} \end{array} $