33 * 3 = 99
12 * 2 = 24
222 * 4 = 888
304 * 2 = 608
420 * 2 = 840
23 * 20 = 460
Вычисления:
$\begin{array}{r}\begin{array}{r}*\end{array}\underline{\begin{array}{r}33\\ 3\end{array}}\\ \begin{array}{r}99\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}*\end{array}\underline{\begin{array}{r}12\\ 2\end{array}}\\ \begin{array}{r}24\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}*\end{array}\underline{\begin{array}{r}222\\ 4\end{array}}\\ \begin{array}{r}888\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}*\end{array}\underline{\begin{array}{r}304\\ 2\end{array}}\\ \begin{array}{r}608\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}*\end{array}\underline{\begin{array}{r}420\\ 2\end{array}}\\ \begin{array}{r}840\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}*\end{array}\underline{\begin{array}{r}23\\ 20\end{array}}\\ \begin{array}{r}460\end{array}\end{array}$