$$2\frac{1}{5}\times2=$$
$\frac{22}{5}=4.4$
$$\frac{10+1}{5}\times 2$$
$$\frac{11}{5}\times 2$$
$$\frac{11\times 2}{5}$$
$$\frac{22}{5}$$
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$\frac{2 \cdot 11}{5} = 4\frac{2}{5} = 4.4$
