$$3\frac{1}{4}\times4\frac{1}{3}$$
$\frac{169}{12}\approx 14.083333333$
$$\frac{12+1}{4}\times \frac{4\times 3+1}{3}$$
$$\frac{13}{4}\times \frac{4\times 3+1}{3}$$
$$\frac{13}{4}\times \frac{12+1}{3}$$
$$\frac{13}{4}\times \frac{13}{3}$$
$$\frac{13\times 13}{4\times 3}$$
$$\frac{169}{12}$$
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$\frac{13 ^ {2}}{2 ^ {2} \cdot 3} = 14\frac{1}{12} = 14.083333333333334$
