$$17/2 \times 17/1$$
$\frac{289}{2}=144.5$
$$\frac{\frac{17\times 17}{2}}{1}$$
$$\frac{\frac{289}{2}}{1}$$
$$\frac{289}{2}$$
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$\frac{17 ^ {2}}{2} = 144\frac{1}{2} = 144.5$
