\[\left( - \frac{2}{5}a^{2}bc^{3} \right)^{3} \cdot 25ac^{2} =\]
\[= - \frac{8}{125}a^{6}b^{3}c^{9} \cdot 25ac^{2} =\]
\[= - 1,6a^{7}b^{3}c^{11}.\]