\[\begin{array}{ll} \begin{array}{l} \begin{array}{l} \phantom{-}30800 \\ \,\,\,\,\,\,\,\overline{\square} \end{array} & \left| \begin{array}{l} \overline{400} \\ \square. \end{array} \right. \end{array} \\ \,\,\phantom{-}\square \\ \,\,\,\,\,\,\,\overline{\square} \\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,0 \end{array}\]