a)
\(\dfrac{\begin{align} & \,\,\,\,\,2057\\ & \times \\ & \,\,\,\,\,\,\,\,\,\,13\,\,\,\, \\ \end{align}}{\,\,\,\,6171}\\\underline{\,\,\,\,2057\,\,\,\,\,\,\,\,\,\,\,\,}\\\,\,\,\,26741\) \(\dfrac{\begin{align} & \,\,\,\,\,\,428\\ & \times \\ &\,\, \,\,\,\,\,125\,\,\,\, \\ \end{align}}{\,\,\,2140}\\\,\,\,\,\,\,856\,\\\underline{\,\,\,428\,\,\,\,\,\,\,\,\,\,\,\,}\\\,\,\,53500\)
\(\dfrac{\begin{align} & \,\,\,\,\,3167\\ & \times \\ &\,\,\,\,\,\,\,\,204\,\,\,\, \\ \end{align}}{\,12668}\\\underline{\,\,6334\,\,\,\,\,\,\,\,\,\,\,\,}\\\,\,646068\)
b)
\(\left. \begin{align} & \begin{matrix} 7368\\\underline{\,\,\,0168}\,\,\, \\\,\,\,\,\,\,\,\,00\,\,\,\, \\\,\underline{} \end{matrix} \\\\\end{align} \right|\begin{matrix} \dfrac{\,\,\,\,24\,\,\,\,\,\,\,}{307\,\,} {} \\ {} \\ \\\\\end{matrix} \) \(\left. \begin{align} & \begin{matrix} 13498\\\underline{\,\,069}\,\,\, \,\,\,\,\, \\\,\,\,\underline{058\,} \end{matrix} \\ & \,\,\,\,\,\,\,\,\,\,26\\\\\end{align} \right|\begin{matrix} \dfrac{\,\,\,\,32\,\,\,\,\,\,\,}{421\,\,} {} \\ {} \\ \\\\\end{matrix} \)
\(\left. \begin{align} & \begin{matrix} 285120\\\underline{0691\,\,\,\,\,}\, \\\,\,\,0432\,\,\,\,\, \\\,\,\,\underline{000} \end{matrix} \\\\\end{align} \right|\begin{matrix} \dfrac{\,\,\,\,216\,\,\,\,\,\,\,}{1320\,\,} {} \\ {} \\ \\\\\end{matrix} \)
