$$\frac{ { 91 }^{ 2 } }{ { 31 }^{ 2 } }$$
$\frac{8281}{961}\approx 8.617065557$
$$\frac{8281}{31^{2}}$$
$$\frac{8281}{961}$$
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$\frac{7 ^ {2} \cdot 13 ^ {2}}{31 ^ {2}} = 8\frac{593}{961} = 8.617065556711758$
