Условие:

Вычисли:
51 * 87;
672 * 83.

$\begin{array}{r}\times \underset{¯}{\begin{array}{r}51\\ 87\end{array}}\\ 357\\ 408\phantom{0}\\ \overline{4437}\end{array}$
 
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}672\\ 83\end{array}}\\ 2016\\ 5376\phantom{0}\\ \overline{55776}\end{array}$