\( \frac{2}{3} \cdot \frac{4}{5} \)
\[ \frac{1}{2} \cdot 0.4 \]
\[ 0.25 \cdot \frac{8}{9} \]
\[ \frac{5}{8} \cdot \frac{4}{15} \]
\[ 2\frac{1}{4} \cdot 1.2 \]
\[ 3.5 \cdot 1\frac{3}{7} \]