$$\frac{4}{7}    of    \frac{8}{9} \div \frac{8}{7} \times 180   of    \frac{1}{9} = ?$$

A

$$\frac{20}{9}$$

B

$$\frac{9}{20}$$

C

$$\frac{80}{9}$$

D

$$\frac{9}{80}$$