A 5 mg particle carrying a charge of $$5\pi \times 10^{-6}$$ C is moving with velocity of $$(3\hat{i} + 2\hat{k}) \times 10^{-2}$$ m/s in a region having magnetic field $$\vec{B} = 0.1 \hat{k}$$ Wb/m$$^2$$. It moves a distance of $$a$$ meter along $$\hat{k}$$ when it completes 5 revolutions. The value of $$a$$ is __________.