If a number is first multiplied by $$\frac{4}{7}$$ and then divided by $$\frac{12}{7}$$, then it is equivalent to which of the following operations on the number?

A

multiplying by $$\frac{1}{3}$$

B

dividing by $$\frac{1}{3}$$

C

multiplying by $$3$$

D

dividing by $$\frac{2}{3}$$