$$6.67 \times 10^{ 11 } \times 75 \times 80$$
$4002000000000000$
$$6.67\times 100000000000\times 75\times 80$$
$$667000000000\times 75\times 80$$
$$50025000000000\times 80$$
$$4002000000000000$$
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$3\times 23\times 29\times 2^{13}\times 5^{12}$
