$$3 \frac{ 1 }{ 11 } \times 4 \frac{ 1 }{ 8 }$$
$\frac{51}{4}=12.75$
$$\frac{33+1}{11}\times \frac{4\times 8+1}{8}$$
$$\frac{34}{11}\times \frac{4\times 8+1}{8}$$
$$\frac{34}{11}\times \frac{32+1}{8}$$
$$\frac{34}{11}\times \frac{33}{8}$$
$$\frac{34\times 33}{11\times 8}$$
$$\frac{1122}{88}$$
$$\frac{51}{4}$$
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$\frac{3 \cdot 17}{2 ^ {2}} = 12\frac{3}{4} = 12.75$
