8 ${м}^2$ 26 $д{м}^2$ + 74 $д{м}^2$ = 8 ${м}^2$ + (26 + 74) $д{м}^2$ = 8 ${м}^2$ + 100 $д{м}^2$ = 8 ${м}^2$ + 1 ${м}^2$ = 9 ${м}^2$
 
9 см 2 мм * 5 = 460 мм = 46 см
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}92\\ 5\end{array}}\\ 460\end{array}$