$$\frac { 7 ^ { 5 } \times 3 ^ { 4 } \times 7 } { 9 \times 49 ^ { 2 } }$$
$441$
$$\frac{7^{6}\times 3^{4}}{9\times 49^{2}}$$
$$\frac{117649\times 3^{4}}{9\times 49^{2}}$$
$$\frac{117649\times 81}{9\times 49^{2}}$$
$$\frac{9529569}{9\times 49^{2}}$$
$$\frac{9529569}{9\times 2401}$$
$$\frac{9529569}{21609}$$
$$441$$
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$3^{2}\times 7^{2}$
