\[0,75a^{9}b^{3}c^{2} \cdot 1\frac{1}{3}a^{4}bc^{7} =\]
\[= \frac{3}{4} \cdot \frac{4}{3}a^{13}b^{4}c^{9} = a^{13}b^{4}c^{9}\]