\[\boxed{\mathbf{568\ (568)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[a = 48\ см;\ \ \]
\[b = a\ :8 = 48\ :8 = 6\ см.\]
\[S = a \cdot b = 48 \cdot 6 = 288\ см^{2}.\]
\[Ответ:288\ см^{2}.\]
\[\boxed{\mathbf{568}.\ }\]
\[14 \rightarrow ост.\ 4;\]
\[61 \rightarrow ост.\ 1;\]
\[86 \rightarrow ост.\ 1;\]
\[235 \rightarrow ост.\ 0;\]
\[2658 \rightarrow ост.\ 3;\]
\[54\ 769 \rightarrow ост.\ 4;\]
\[687\ 903 \rightarrow ост.\ 3.\]