$$\frac{ 4 }{ 7 } \frac{ 4 }{ 7 } \frac{ 9 }{ 7 } |7=$$
$\frac{144}{49}\approx 2.93877551$
$$\frac{4\times 4}{7\times 7}\times \frac{9}{7}|7|$$
$$\frac{16}{49}\times \frac{9}{7}|7|$$
$$\frac{16\times 9}{49\times 7}|7|$$
$$\frac{144}{343}|7|$$
$$\frac{144}{343}\times 7$$
$$\frac{144\times 7}{343}$$
$$\frac{1008}{343}$$
$$\frac{144}{49}$$
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$\frac{2 ^ {4} \cdot 3 ^ {2}}{7 ^ {2}} = 2\frac{46}{49} = 2.938775510204082$
