$$55 \times 6/9 \times 63$$
$2310$
$$\frac{330}{9}\times 63$$
$$\frac{110}{3}\times 63$$
$$\frac{110\times 63}{3}$$
$$\frac{6930}{3}$$
$$2310$$
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$2\times 3\times 5\times 7\times 11$