$$18 \cos 53$$
$10.8326704167368712$
$$18 \cdot 0.6018150231520484$$
$$10.8326704167368712$$
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$\frac{251 \cdot 35531 \cdot 168702641 \cdot 3 ^ {2}}{2 ^ {13} \cdot 5 ^ {16}} = 10\frac{1040838020921088}{1250000000000000} = 10.832670416736871$
