$$\frac{ { 257 }^{ 2 } }{ { 180 }^{ 2 } } { 49 }^{ 2 } =$$
$\frac{158583649}{32400}\approx 4894.557067901$
$$\frac{66049}{180^{2}}\times 49^{2}$$
$$\frac{66049}{32400}\times 49^{2}$$
$$\frac{66049}{32400}\times 2401$$
$$\frac{66049\times 2401}{32400}$$
$$\frac{158583649}{32400}$$
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$\frac{7 ^ {4} \cdot 257 ^ {2}}{2 ^ {4} \cdot 3 ^ {4} \cdot 5 ^ {2}} = 4894\frac{18049}{32400} = 4894.557067901234$