$$7 \times \frac{ 25 }{ 2 } + \frac{ 1 }{ 4 }$$
$\frac{351}{4}=87.75$
$$\frac{7\times 25}{2}+\frac{1}{4}$$
$$\frac{175}{2}+\frac{1}{4}$$
$$\frac{350}{4}+\frac{1}{4}$$
$$\frac{350+1}{4}$$
$$\frac{351}{4}$$
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$\frac{3 ^ {3} \cdot 13}{2 ^ {2}} = 87\frac{3}{4} = 87.75$
