Divide $9 a^{2} b y 3$ .

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Solution

Division of monomials.
Quotient of two monomials $=$ (Quotient of their numerical coefficients) (Quotient of their literal coefficients)
$\begin{array}{rcl} 9 a^{2} b y 3 & = & \frac{9 \times a^{2}}{3} \\ = & 3 a^{2} \end{array}$
Therefore, the result of division is $3 a^{2}$ .

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