$$9l^{3}m^{2}n.18l^{2}m^{3}n.81lm^{3}n=$$
$\frac{6561n^{3}l^{6}m^{8}}{5000}$
$$9l^{5}m^{2}n\times 0.18m^{3}n\times 0.81lm^{3}n$$
$$9l^{6}m^{2}n\times 0.18m^{3}n\times 0.81m^{3}n$$
$$9l^{6}m^{5}n\times 0.18n\times 0.81m^{3}n$$
$$9l^{6}m^{8}n\times 0.18n\times 0.81n$$
$$9l^{6}m^{8}n^{2}\times 0.18\times 0.81n$$
$$9l^{6}m^{8}n^{3}\times 0.18\times 0.81$$
$$1.62l^{6}m^{8}n^{3}\times 0.81$$
$$1.3122l^{6}m^{8}n^{3}$$
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$\frac{19683n^{3}l^{5}m^{8}}{2500}$
