$$2\cdot\frac{14}{36}\times\frac{12}{21}=$$
$\frac{4}{9}\approx 0.444444444$
$$2\times \frac{7}{18}\times \frac{12}{21}$$
$$\frac{2\times 7}{18}\times \frac{12}{21}$$
$$\frac{14}{18}\times \frac{12}{21}$$
$$\frac{7}{9}\times \frac{12}{21}$$
$$\frac{7}{9}\times \frac{4}{7}$$
$$\frac{7\times 4}{9\times 7}$$
$$\frac{4}{9}$$
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$\frac{2 ^ {2}}{3 ^ {2}} = 0.4444444444444444$