\begin{equation}1.28 \times 10^{2}\end{equation}

\begin{equation}5.45 \times 10^{5}\end{equation}

\begin{equation}800 \times 10^{(-2)}\end{equation}

\begin{equation}55.8 \times 10^{4}\end{equation}

\begin{equation}0.08 \times 10^{(-2)}\end{equation}

\begin{equation}4.88 \times 10^{(-4)}\end{equation}

\begin{equation}21.05 \times 10^{(-5)}\end{equation}

\begin{equation}0.000232\end{equation}

\begin{equation}296600\end{equation}

\begin{equation}637.4\end{equation}

\begin{equation}5200\end{equation}

\begin{equation}4784600\end{equation}

\begin{equation}0.0005\end{equation}

\begin{equation}6508100\end{equation}

\begin{equation}0.0004\end{equation}

\begin{equation}2.1 \times 10^{2} \times 0.5 \times 10^{(-4)}\end{equation}