-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)=?是多少

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-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)=?是多少-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)=?是多少-12x^3y^4÷(-3x^2y^3)·(-1/3x^

-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)=?是多少
-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)=?是多少

-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)=?是多少
-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)
=4xy·(-1/3x^2y)
=-4/3x^3y^2