Answer
$\frac{1}{9}$
Work Step by Step
When an exponential expression has a negative exponent, change the position of the base (from the numerator to the denominator, or vise-versa) and make the exponent positive.
$$3^{-3}\times3$$
$$=\frac{1}{3^{3}}\times3$$
$$=\frac{1}{27}\times\frac{3}{1}$$
$$=\frac{1}{9}$$
