\[1\frac{5}{19} \cdot^{2}\left( 6 -^{1}3\frac{5}{8} \right) = 3\]
\[1)\ 6 - 3\frac{5}{8} = 5\frac{8}{8} - 3\frac{5}{8} = 2\frac{8 - 5}{8} = 2\frac{3}{8}\]
\[2)\ 1\frac{5}{19} \cdot 2\frac{3}{8} = \frac{24}{19} \cdot \frac{19}{8} = \frac{24}{8} = 3\]