$$3 \frac { 2 } { 5 } \times 7 \frac { 1 } { 4 }$$
$\frac{493}{20}=24.65$
$$\frac{15+2}{5}\times \frac{7\times 4+1}{4}$$
$$\frac{17}{5}\times \frac{7\times 4+1}{4}$$
$$\frac{17}{5}\times \frac{28+1}{4}$$
$$\frac{17}{5}\times \frac{29}{4}$$
$$\frac{17\times 29}{5\times 4}$$
$$\frac{493}{20}$$
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$\frac{17 \cdot 29}{2 ^ {2} \cdot 5} = 24\frac{13}{20} = 24.65$
