(-1/3a²b³)³.(-1/4a²b³).(-1/2a²b^4)²

(-1/3a²b³)³.(-1/4a²b³).(-1/2a²b^4)²
(-1/3a²b³)³.(-1/4a²b³).(-1/2a²b^4)²

(-1/3a²b³)³.(-1/4a²b³).(-1/2a²b^4)²
(-1/3a²b³)³.(-1/4a²b³).(-1/2a²b^4)²
=1/27a的6次方b的9次方x 1/4a的2次方b的3次方x1/4a的4次方b的8次方
=1/432a的12次方b的20次方

=-1/27a^6b^9×(-1/4a²b³)×(1/4a^4b^8)
=1/432a^12b^20