$$3 \frac { 3 } { 4 } \times 30$$
$\frac{225}{2}=112.5$
$$\frac{12+3}{4}\times 30$$
$$\frac{15}{4}\times 30$$
$$\frac{15\times 30}{4}$$
$$\frac{450}{4}$$
$$\frac{225}{2}$$
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$\frac{3 ^ {2} \cdot 5 ^ {2}}{2} = 112\frac{1}{2} = 112.5$
