\[\begin{array}{ll} \begin{array}{l} \begin{array}{l} \,\,\,\,{}_{-\!}60800\,\,\,\,\,\, \\ \,\,\,\underline{\,\Box} \end{array} & \left|\begin{array}{l} \underline{8\,\,\,\,\,\,\,\,\,} \\ \Box \end{array}\right. \end{array} \\ \,\,\,\,\,{}_{-\!}\Box \\ \,\,\,\,\,\,\,\,\,\underline{\Box} \\ \qquad\qquad 0 \end{array}\]