\[\boxed{\mathbf{578}.\ }\]
\[31 \rightarrow ост.\ 1;\]
\[47 \rightarrow ост.\ 7;\]
\[53 \rightarrow ост.\ 3;\]
\[148 \rightarrow ост.\ 8;\]
\[1596 \rightarrow ост.\ 6;\]
\[67\ 389 \rightarrow ост.\ 9;\]
\[240\ 750 \rightarrow ост.\ 0.\]