$$\sqrt{ 1/8/8 \times 7 }$$
$\frac{\sqrt{7}}{8}\approx 0.330718914$
$$\sqrt{\frac{1}{8\times 8}\times 7}$$
$$\sqrt{\frac{1}{64}\times 7}$$
$$\sqrt{\frac{7}{64}}$$
$$\frac{\sqrt{7}}{\sqrt{64}}$$
$$\frac{\sqrt{7}}{8}$$
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