a) $$
\begin{array}{r} - \\
\end{array}
\begin{array}{l}6237 \\
63 \\
\hline -23 \\
0 \\
\hline 237 \\
27 \\
\hline 0\\
\end{array}
| \begin{array}{l}9 \\
693\\
\end{array}
$$
$$6237 : 9 = 693$$
б) $$
\begin{array}{r} - \\
\end{array}
\begin{array}{l}61596 \\
609 \\
\hline -696 \\
609 \\
\hline 87\\
\end{array}
| \begin{array}{l}87 \\
708\\
\end{array}
$$
$$61596 : 87 = 708$$
в) $$
\begin{array}{r} - \\
\end{array}
\begin{array}{l}15792 \\
1316 \\
\hline -2632 \\
2632 \\
\hline 0\\
\end{array}
| \begin{array}{l}329 \\
48\\
\end{array}
$$
$$15792 : 329 = 48$$
Ответ: a) 693; б) 708; в) 48