9. \(2\frac{1}{4}\times1\frac{1}{3}\)

\(2\frac{1}{4}=\frac{9}{4},\quad 1\frac{1}{3}=\frac{4}{3}\).

\[\frac{9}{4}\times\frac{4}{3}=\frac{9}{3}=3\]

Ответ: 3.