$$9.5 \times \frac{ 7 }{ 8 } \times \frac{ 31 }{ 9 }$$
$\frac{4123}{144}\approx 28.631944444$
$$\frac{19}{2}\times \frac{7}{8}\times \frac{31}{9}$$
$$\frac{19\times 7}{2\times 8}\times \frac{31}{9}$$
$$\frac{133}{16}\times \frac{31}{9}$$
$$\frac{133\times 31}{16\times 9}$$
$$\frac{4123}{144}$$
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$\frac{7 \cdot 19 \cdot 31}{2 ^ {4} \cdot 3 ^ {2}} = 28\frac{91}{144} = 28.631944444444443$
