$$\frac{63^{2}\times7^{8}}{21^{5}\times3^{4}}$$
$\frac{16807}{243}\approx 69.164609053$
$$\frac{3969\times 7^{8}}{21^{5}\times 3^{4}}$$
$$\frac{3969\times 5764801}{21^{5}\times 3^{4}}$$
$$\frac{22880495169}{21^{5}\times 3^{4}}$$
$$\frac{22880495169}{4084101\times 3^{4}}$$
$$\frac{22880495169}{4084101\times 81}$$
$$\frac{22880495169}{330812181}$$
$$\frac{16807}{243}$$
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$\frac{7 ^ {5}}{3 ^ {5}} = 69\frac{40}{243} = 69.16460905349794$
