A point charge of 10^{-8}\text{ C} is placed at origin. The work done in moving a point charge 2\mu\text{C} from point A(4, 4, 2)\text{ m} to B(2, 2, 1)\text{ m} is ____ J. \\\left( \frac{1}{4\pi\epsilon_0} = 9 \times 10^9 \text{ in SI units} \right)