$$\frac{ 31 }{ 15 } \times \frac{ 321 }{ 31 } \times \frac{ 43 }{ 4 }$$
$\frac{4601}{20}=230.05$
$$\frac{31\times 321}{15\times 31}\times \frac{43}{4}$$
$$\frac{321}{15}\times \frac{43}{4}$$
$$\frac{107}{5}\times \frac{43}{4}$$
$$\frac{107\times 43}{5\times 4}$$
$$\frac{4601}{20}$$
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$\frac{43 \cdot 107}{2 ^ {2} \cdot 5} = 230\frac{1}{20} = 230.05$
