$$2\times\frac{314}{100}\times15$$
$\frac{471}{5}=94.2$
$$2\times \frac{157}{50}\times 15$$
$$\frac{2\times 157}{50}\times 15$$
$$\frac{314}{50}\times 15$$
$$\frac{157}{25}\times 15$$
$$\frac{157\times 15}{25}$$
$$\frac{2355}{25}$$
$$\frac{471}{5}$$
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$\frac{3 \cdot 157}{5} = 94\frac{1}{5} = 94.2$