\[3\frac{1}{11} \cdot 4\frac{2}{5} + 1\frac{5}{11} \cdot 4\frac{2}{5} =\]
\[= 4\frac{2}{5} \cdot \left( 3\frac{1}{11} + 1\frac{5}{11} \right) =\]
\[= \frac{22}{5} \cdot \left( \frac{34}{11} + \frac{16}{11} \right) = \frac{22 \cdot 50}{5 \cdot 11} = 20\]