\[3\frac{4}{5} \cdot 1\frac{1}{8} + 1\frac{1}{5} \cdot 1\frac{1}{8} =\]
\[= 1\frac{1}{8} \cdot \left( 3\frac{4}{5} + 1\frac{1}{5} \right) = \frac{9}{8} \cdot 4\frac{5}{5} =\]
\[= \frac{9}{8} \cdot 5 = \frac{45}{8} = 5\frac{5}{8}.\]