Simplify : $ \large\frac{49 \times t^{-5}}{7^{-3} \times 10 \times t^{-9}}$

Question

$\begin{array}{1 1} 7^5t^4 \\ \large\frac{7^5 \times t^4}{10} \\ \large\frac{t^4}{10} \\ \large\frac{7^5}{10} \end{array} $