$$50 \times 31 \frac { 3 } { 4 }$$
$\frac{3175}{2}=1587.5$
$$50\times \frac{124+3}{4}$$
$$50\times \frac{127}{4}$$
$$\frac{50\times 127}{4}$$
$$\frac{6350}{4}$$
$$\frac{3175}{2}$$
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$\frac{5 ^ {2} \cdot 127}{2} = 1587\frac{1}{2} = 1587.5$
