$$\begin{matrix}3\\ 6\end{matrix}\times\begin{matrix}9\\ 11\end{matrix}; \overline{16}$$
$\frac{9}{2}=4.5$
$$\frac{1}{2}\times 9$$
$$\frac{9}{2}$$
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$\frac{3 ^ {2}}{2} = 4\frac{1}{2} = 4.5$
