\[- 3\frac{1}{5} \cdot 1\frac{1}{4} = - \frac{15 + 1}{5} \cdot \frac{4 + 1}{4} =\]
\[= - \frac{16}{5} \cdot \frac{5}{4} = - \frac{16 \cdot 5}{8 \cdot 4} = - 4\]