$${ 2 }^{ 2 } / { 2 }^{ 2 } { 3 }^{ 2 } { 7 }^{ 2 }$$
$441$
$$1\times 3^{2}\times 7^{2}$$
$$1\times 9\times 7^{2}$$
$$9\times 7^{2}$$
$$9\times 49$$
$$441$$
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$3^{2}\times 7^{2}$
