\[\boxed{\text{178\ (178).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1\ {см}^{2} = 100\ {мм}^{2}\]
\[1\ {дм}^{2} = 100\ {см}^{2}\]
\[1\ м^{2} = 100\ {дм}^{2}\]
\[1\ {дм}^{2} = 10\ 000\ {мм}^{2}\]
\[1\ м^{2} = 10\ 000\ {см}^{2}\]
\[1\ {км}^{2} = 1\ 000\ 000\ м^{2}\]