$$7 \times 3 \frac{ 3 }{ 14 }$$
$\frac{45}{2}=22.5$
$$7\times \frac{42+3}{14}$$
$$7\times \frac{45}{14}$$
$$\frac{7\times 45}{14}$$
$$\frac{315}{14}$$
$$\frac{45}{2}$$
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$\frac{3 ^ {2} \cdot 5}{2} = 22\frac{1}{2} = 22.5$
