$$(3^{9}\div3^{11})\times3^{-8}$$
$\frac{1}{59049}\approx 0.000016935$
$$\frac{1}{3^{2}}\times 3^{-8}$$
$$\frac{1}{9}\times 3^{-8}$$
$$\frac{1}{9}\times \frac{1}{6561}$$
$$\frac{1}{59049}$$
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$\frac{1}{3 ^ {10}} = 1.6935087808430285 \times 10^{-5}$