A dielectric sphere carries a uniform polarization \(P = 26\ \mu\text{C}.\text{cm}^{-2}\). The magnitude of the electric field at the center of the sphere is \(E \times 10^{9}\ \text{N}.\text{C}^{-1}\). The value of \(E\) (rounded off to one decimal place) is . \((\epsilon_0 = 8.85 \times 10^{-12}\ \text{C}^{2}.\text{N}^{-1}.\text{m}^{-2})\)