Решение:
\[ \frac{6(a^2b)^3}{a^6b^4} = \frac{6 \cdot (a^2)^3 \cdot b^3}{a^6b^4} = \frac{6 \cdot a^{2 \cdot 3} \cdot b^3}{a^6b^4} = \frac{6a^6b^3}{a^6b^4} \]
\[ 6 \cdot \frac{a^6}{a^6} \cdot \frac{b^3}{b^4} = 6 \cdot 1 \cdot b^{3-4} = 6b^{-1} = \frac{6}{b} \]
\[ \frac{6}{2} = 3 \]
Ответ: 3