$$\frac{1}{4}\times2\times3\cdot142\times30$$
$6390$
$$\frac{2}{4}\times 3\times 142\times 30$$
$$\frac{1}{2}\times 3\times 142\times 30$$
$$\frac{3}{2}\times 142\times 30$$
$$\frac{3\times 142}{2}\times 30$$
$$\frac{426}{2}\times 30$$
$$213\times 30$$
$$6390$$
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$2\times 3^{2}\times 5\times 71$
