$$69 \sqrt{ \frac{ 91 }{ 91 \times 91 } }$$
$\frac{69\sqrt{91}}{91}\approx 7.233165373$
$$69\sqrt{\frac{91}{8281}}$$
$$69\sqrt{\frac{1}{91}}$$
$$69\times \frac{\sqrt{1}}{\sqrt{91}}$$
$$69\times \frac{1}{\sqrt{91}}$$
$$69\times \frac{\sqrt{91}}{\left(\sqrt{91}\right)^{2}}$$
$$69\times \frac{\sqrt{91}}{91}$$
$$\frac{69\sqrt{91}}{91}$$
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