$$\frac{ 448 }{ 441 } \sqrt{ 7 } \times 169$$
$\frac{10816\sqrt{7}}{63}\approx 454.229304452$
$$169\times \frac{64}{63}\sqrt{7}$$
$$\frac{169\times 64}{63}\sqrt{7}$$
$$\frac{10816}{63}\sqrt{7}$$
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