Solve for: 5000 * 5000 * 50000 * 50000

Expression: $5000 \times 5000 \times 50000 \times 50000$

$25000000 \times 50000 \times 50000$

$1250000000000 \times 50000$

$\begin{align*}&62500000000000000 \\&6.25 \times {10}^{16}\end{align*}$