$$\frac{ 7 }{ 10 } \times \frac{ 14 }{ 20 }$$
$\frac{49}{100}=0.49$
$$\frac{7}{10}\times \frac{7}{10}$$
$$\frac{7\times 7}{10\times 10}$$
$$\frac{49}{100}$$
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$\frac{7 ^ {2}}{2 ^ {2} \cdot 5 ^ {2}} = 0.49$
