$$\frac { 14 } { 5 } \frac { 72 } { 10 }$$
$\frac{504}{25}=20.16$
$$\frac{14}{5}\times \frac{36}{5}$$
$$\frac{14\times 36}{5\times 5}$$
$$\frac{504}{25}$$
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$\frac{2 ^ {3} \cdot 3 ^ {2} \cdot 7}{5 ^ {2}} = 20\frac{4}{25} = 20.16$