Let's break this down into smaller pieces!
\[ 3\frac{1}{3} = \frac{10}{3} \quad \text{and} \quad 4\frac{1}{2} = \frac{9}{2} \]
\[ 1.9 = \frac{19}{10} \quad \text{and} \quad 19.5 = \frac{195}{10} = \frac{39}{2} \]
\[ \frac{10}{3} \cdot \frac{19}{10} = \frac{19}{3} \]
\[ \frac{39}{2} : \frac{9}{2} = \frac{39}{2} \times \frac{2}{9} = \frac{39}{9} = \frac{13}{3} \]
\[ \frac{19}{3} + \frac{13}{3} = \frac{32}{3} \]
\[ \frac{4}{25} = \frac{4 \times 3}{25 \times 3} = \frac{12}{75} \]
\[ \frac{62}{75} - \frac{12}{75} = \frac{50}{75} = \frac{2}{3} \]
\[ \frac{32}{3} : \frac{2}{3} = \frac{32}{3} \times \frac{3}{2} = \frac{32}{2} = 16 \]
Answer: 16