Answer
$\frac{81}{4096}$
Work Step by Step
$(\frac{3}{8})^{4}=\frac{3}{8}\times\frac{3}{8}\times\frac{3}{8}\times\frac{3}{8}=\frac{3\times3\times3\times3}{8\times8\times8\times8}=\frac{81}{4096}$
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