Решение:
$$\begin{array}{@{}c@{\thinspace\thinspace}c@{\thinspace\thinspace}c@{\thinspace\thinspace}c@{\thinspace\thinspace}c} & & 3 & 2 & 3 \\ & \times & 1 & 0 & 7 \\ & & 2 & 2 & 6 & 1 \\ +& 3 & 2 & 3 & & \\ \hline & 3 & 4 & 5 & 6 & 1 \end{array}$$
$$\begin{array}{@{}c@{\thinspace\thinspace}c@{\thinspace\thinspace}c@{\thinspace\thinspace}c@{\thinspace\thinspace}c} & & 1 & 4 & 5 \\ & \times & 1 & 0 & 4 \\ & & 5 & 8 & 0 \\ +& 1 & 4 & 5 & & \\ \hline & 1 & 5 & 0 & 8 & 0 \end{array}$$
Ответ: $$323 \times 107 =$$ 34561; $$145 \times 104 =$$ 15080.