Задание 2, 3) 4 3/8 * (3/8 + 4 13/13)

\( 4 \frac{3}{8} \cdot \left( \frac{3}{8} + 4 \frac{13}{13} \right) = \frac{35}{8} \cdot \frac{32}{8} = \frac{1120}{64} = 17.5 \).