A parallel-plate capacitor, with air between the plates, is connected to a battery. The battery establishes a potential difference between the plates by placing charge of magnitude 3.47 x 10^-6 C on each plate. The space between the plates is then filled with a dielectric material, with dielectric constant K= 5.07. What must the magnitude of the charge on each capacitor plate now be, to produce the same potential difference between the plates as before?