$$6.35\times6.35+2\times6.35\times3.65+3.65\times3.65$$
$100$
$$40.3225+2\times 6.35\times 3.65+3.65\times 3.65$$
$$40.3225+12.7\times 3.65+3.65\times 3.65$$
$$40.3225+46.355+3.65\times 3.65$$
$$86.6775+3.65\times 3.65$$
$$86.6775+13.3225$$
$$100$$
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$2^{2}\times 5^{2}$
