$$\frac{ { 9 }^{ 3 } }{ { 9 }^{ 7 } }$$
$\frac{1}{6561}\approx 0.000152416$
$$\frac{1}{9^{4}}$$
$$\frac{1}{6561}$$
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$\frac{1}{3 ^ {8}} = 0.00015241579027587258$
