\[\frac{2}{9}a^{5}c \cdot \left( - 15b^{3}c^{2} \right) \cdot 1,2a^{3}b^{6} =\]
\[= - \frac{2}{9} \cdot 15 \cdot \frac{6}{5}a^{8}b^{9}c^{3} =\]
\[= - 4a^{8}b^{9}c^{3}\]