$\"\"$

Observe the solid figure, it is a rectangular prism.

The length of the rectangular prism $\"\"$ and its width $\"\"$ and its height $\"\"$ .

The volume of the rectangular prism $\"\"$ .

The value of $\"\"$ are substitute in the equation, $\"\"$ .

$\"\"$ $\"\"$

Group the coefficients and the variables.

$\"\"$

Apply product of powers property: $\"\"$ .

$\"\"$

The volume of the cylinder is a monomial, since this expression has product of one number and one variable with nonnegative integer exponents. \ \ $\"\"$

The monomial expression of volume of the rectangular prism $\"\"$ .