$$1 \frac{ 6 }{ 6 } 91 \sqrt{ 669 }$$
$182\sqrt{669}\approx 4707.436244921$
$$91\times \frac{6+6}{6}\sqrt{669}$$
$$91\times \frac{12}{6}\sqrt{669}$$
$$91\times 2\sqrt{669}$$
$$182\sqrt{669}$$
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