$${ 2 }^{ 2 } \times { 4 }^{ 2 } \times { 9 }^{ 2 } \sqrt{ 5 }$$
$5184\sqrt{5}\approx 11591.776395359$
$$4\times 4^{2}\times 9^{2}\sqrt{5}$$
$$4\times 16\times 9^{2}\sqrt{5}$$
$$64\times 9^{2}\sqrt{5}$$
$$64\times 81\sqrt{5}$$
$$5184\sqrt{5}$$
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