In an ac generator, a rectangular coil of $$100$$ turns each having area $$14 \times 10^{-2}$$ m$$^2$$ is rotated at $$360$$ rev min$$^{-1}$$ about an axis perpendicular to a uniform magnetic field of magnitude $$3.0$$ T. The maximum value of the emf produced will be ______ V. [Take $$\pi = \frac{22}{7}$$]