Answer
Estimate: $12$
Exact: $16\frac{1}{2}$
Work Step by Step
Estimate: round the three numbers to 6, 1, and 2 and multiply.
Exact: change the numbers into improper fractions: $\frac{11}{2}, \frac{4}{3}, \frac{9}{4}$
Multiply: $\frac{11}{2}\times\frac{4}{3} = \frac{22}{3}$
$\frac{22}{3}\times\frac{9}{4} = \frac{33}{2}$
Change into a mixed (or whole) number: $16\frac{1}{2}$
