\[\boxed{\text{260.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[4\ м^{2} = 400\ дм^{2}.\]
\[8\ м^{2} = 80\ 000\ см^{2}.\]
\[63\ 000\ см^{2} = 630\ дм^{2}.\]
\[8\ 100\ дм^{2} = 81\ м^{2}.\]
\[5\ сут = 120\ ч.\]
\[360\ мин = 6\ ч.\ \]