$$2\frac{4}{5}\times6\frac{1}{2}\times1\frac{1}{2}$$
$\frac{273}{10}=27.3$
$$\frac{10+4}{5}\times \frac{6\times 2+1}{2}\times \frac{1\times 2+1}{2}$$
$$\frac{14}{5}\times \frac{6\times 2+1}{2}\times \frac{1\times 2+1}{2}$$
$$\frac{14}{5}\times \frac{12+1}{2}\times \frac{1\times 2+1}{2}$$
$$\frac{14}{5}\times \frac{13}{2}\times \frac{1\times 2+1}{2}$$
$$\frac{14\times 13}{5\times 2}\times \frac{1\times 2+1}{2}$$
$$\frac{182}{10}\times \frac{1\times 2+1}{2}$$
$$\frac{91}{5}\times \frac{1\times 2+1}{2}$$
$$\frac{91}{5}\times \frac{2+1}{2}$$
$$\frac{91}{5}\times \frac{3}{2}$$
$$\frac{91\times 3}{5\times 2}$$
$$\frac{273}{10}$$
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$\frac{3 \cdot 7 \cdot 13}{2 \cdot 5} = 27\frac{3}{10} = 27.3$
