$$663 \cos 49$$
$434.9671362207063399$
$$663 \cdot 0.6560590289905073$$
$$434.9671362207063399$$
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$\frac{3 \cdot 13 \cdot 29 \cdot 13307485375061 \cdot 17 ^ {2}}{2 ^ {16} \cdot 5 ^ {16}} = 434\frac{9671362207063552}{10000000000000000} = 434.9671362207064$
