$${ 4 }^{ 2 } \sqrt{ { 4 }^{ 2 } \div 446 } \div { 4 }^{ 2 }$$
$\frac{2\sqrt{446}}{223}\approx 0.18940549$
$$\frac{16\sqrt{\frac{4^{2}}{446}}}{4^{2}}$$
$$\frac{16\sqrt{\frac{16}{446}}}{4^{2}}$$
$$\frac{16\sqrt{\frac{8}{223}}}{4^{2}}$$
$$\frac{16\times \frac{\sqrt{8}}{\sqrt{223}}}{4^{2}}$$
$$\frac{16\times \frac{2\sqrt{2}}{\sqrt{223}}}{4^{2}}$$
$$\frac{16\times \frac{2\sqrt{2}\sqrt{223}}{\left(\sqrt{223}\right)^{2}}}{4^{2}}$$
$$\frac{16\times \frac{2\sqrt{2}\sqrt{223}}{223}}{4^{2}}$$
$$\frac{16\times \frac{2\sqrt{446}}{223}}{4^{2}}$$
$$\frac{\frac{16\times 2\sqrt{446}}{223}}{4^{2}}$$
$$\frac{\frac{16\times 2\sqrt{446}}{223}}{16}$$
$$\frac{16\times 2\sqrt{446}}{223\times 16}$$
$$\frac{2\sqrt{446}}{223}$$
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