а) \begin{array}{@{}c@{\,}c@{,}c@{,}c@{,}c}
& & 7 & 0 & 6 \\
& \times & & 3 & 8 \\
\hline
& 5 & 6 & 4 & 8 \\
2 & 1 & 1 & 8 & \\
\hline
2 & 6 & 8 & 2 & 8
\end{array}
$$706 \cdot 38 = 26828$$
б) \begin{array}{@{}c@{\,}c@{,}c@{,}c}
& & 5 & 9 & 2 \\
& \times & & 2 & 5 \\
\hline
& 2 & 9 & 6 & 0 \\
1 & 1 & 8 & 4 & \\
\hline
1 & 4 & 8 & 0 & 0
\end{array}
$$592 \cdot 25 = 14800$$
в) \begin{array}{@{}c@{\,}c@{,}c@{,}c@{,}c@{,}c}
& & & 4 & 1 & 8 & 0 \\
& \times & & & 5 & 6 \\
\hline
& & 2 & 5 & 0 & 8 & 0 \\
2 & 0 & 9 & 0 & 0 & & \\
\hline
2 & 3 & 4 & 0 & 8 & 0
\end{array}
$$4180 \cdot 56 = 234080$$