$$( \frac{ 3 }{ 7 } ) \times ( \frac{ 3 }{ 7 } )$$
$\frac{9}{49}\approx 0.183673469$
$$\frac{3\times 3}{7\times 7}$$
$$\frac{9}{49}$$
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$\frac{3 ^ {2}}{7 ^ {2}} = 0.1836734693877551$
