3. Вычислите: \( 1 \frac{11}{19} \cdot 9 \frac{1}{2} + 4 \frac{11}{16} \).

\( \frac{30}{19} \cdot \frac{19}{2} + \frac{75}{16} = 15 + \frac{75}{16} = \frac{315}{16} \approx 19.6875 \).