$$3\times0.3\times0.03\times0.003\times30$$
$0.00243$
$$0.9\times 0.03\times 0.003\times 30$$
$$0.027\times 0.003\times 30$$
$$0.000081\times 30$$
$$0.00243$$
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$\frac{3 ^ {5}}{2 ^ {5} \cdot 5 ^ {5}} = 0.00243$
