$$\frac{ 320 }{ 8 } + \frac{ 40 }{ 5 } + \frac{ 40 }{ 7 }$$
$\frac{376}{7}\approx 53.714285714$
$$40+\frac{40}{5}+\frac{40}{7}$$
$$40+8+\frac{40}{7}$$
$$48+\frac{40}{7}$$
$$\frac{336}{7}+\frac{40}{7}$$
$$\frac{336+40}{7}$$
$$\frac{376}{7}$$
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$\frac{2 ^ {3} \cdot 47}{7} = 53\frac{5}{7} = 53.714285714285715$
