What is 668 Divided by 21 using Long Division?

$$ \begin{array}{rl} & 031 \phantom{00} \leftarrow Quotient \\[-4pt] Divisor \rightarrow \phantom{0} 21 \kern-1ex & \kern-1ex \enclose{longdiv}{668} \phantom{0} \leftarrow Dividend \\[-4pt] & \phantom{} \underline{\phantom{} 0\phantom{0}} \\[-4pt] & \phantom{} 6 6 \\[-4pt] & \phantom{} \underline{\phantom{} 63\phantom{0}} \\[-4pt] & \phantom{0} 3 8 \\[-4pt] & \phantom{0} \underline{\phantom{} 21\phantom{0}} \\[-4pt] & \phantom{0} 17 \phantom{0} \leftarrow Remainder \\[-4pt] \end{array} $$