$$4 \frac { 1 } { 3 } \times 9 \frac { 1 } { 4 }$$
$\frac{481}{12}\approx 40.083333333$
$$\frac{12+1}{3}\times \frac{9\times 4+1}{4}$$
$$\frac{13}{3}\times \frac{9\times 4+1}{4}$$
$$\frac{13}{3}\times \frac{36+1}{4}$$
$$\frac{13}{3}\times \frac{37}{4}$$
$$\frac{13\times 37}{3\times 4}$$
$$\frac{481}{12}$$
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$\frac{13 \cdot 37}{2 ^ {2} \cdot 3} = 40\frac{1}{12} = 40.083333333333336$
