$=\frac{3}{4}\times \frac{5}{9}\times \frac{18}{5}$
Multiply fractions $\frac{a}{b}\times\frac{c}{d}=\frac{a \times c}{b \times d}$$=\frac{3\times 5\times 18}{4\times 9\times 5}$
Cancel the common factor: $ 5$$=\frac{3\times 18}{4\times 9}$
Multiply the numbers: $ 3\times 18=54$$=\frac{54}{4\times 9}$
Multiply the numbers: $ 4\times 9=36$$=\frac{54}{36}$
Cancel the common factor: $ 18$$=\frac{3}{2}$