Answer
$57$
Work Step by Step
The expanded form of $321_{\text{four}}$ is:
$=(3 \times 4^2) + (2 \times 4^1) + (1 \times 1)
\\=(3\times 16) + (2 \times 4) + 1
\\=48 +8+1
\\=57$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.