$$470 \sqrt{ \frac{ 1 }{ 470 \times 1 } }$$
$\sqrt{470}\approx 21.679483389$
$$470\sqrt{\frac{1}{470}}$$
$$470\times \frac{\sqrt{1}}{\sqrt{470}}$$
$$470\times \frac{1}{\sqrt{470}}$$
$$470\times \frac{\sqrt{470}}{\left(\sqrt{470}\right)^{2}}$$
$$470\times \frac{\sqrt{470}}{470}$$
$$\sqrt{470}$$
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