Answer
$10,354$
Work Step by Step
The expanded form of $3104_{\text{fifteen}}$ is:
$=(3 \times 15^3) + (1 \times 15^2) + (0 \times 15^1) + (4 \times 1)
\\=(3\times 3375) + (1\times 225) + 0+4
\\=10,125+225+4
\\=10,354$
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