$$3 \frac{ 4 }{ 7 } 4 \sqrt{ 4 } 2$$
$\frac{400}{7}\approx 57.142857143$
$$8\times \frac{3\times 7+4}{7}\sqrt{4}$$
$$8\times \frac{21+4}{7}\sqrt{4}$$
$$8\times \frac{25}{7}\sqrt{4}$$
$$\frac{8\times 25}{7}\sqrt{4}$$
$$\frac{200}{7}\sqrt{4}$$
$$\frac{200}{7}\times 2$$
$$\frac{200\times 2}{7}$$
$$\frac{400}{7}$$
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$\frac{2 ^ {4} \cdot 5 ^ {2}}{7} = 57\frac{1}{7} = 57.142857142857146$
