What is 644 Divided by 1 using Long Division?

$$ \begin{array}{rl} & 644 \phantom{00} \leftarrow Quotient \\[-4pt] Divisor \rightarrow \phantom{0} 1 \kern-1ex & \kern-1ex \enclose{longdiv}{644} \phantom{0} \leftarrow Dividend \\[-4pt] & \phantom{} \underline{\phantom{} 6\phantom{0}} \\[-4pt] & \phantom{} 0 4 \\[-4pt] & \phantom{0} \underline{\phantom{} 4\phantom{0}} \\[-4pt] & \phantom{0} 0 4 \\[-4pt] & \phantom{00} \underline{\phantom{} 4\phantom{0}} \\[-4pt] & \phantom{00} 0 \phantom{0} \leftarrow Remainder \\[-4pt] \end{array} $$