Solving a problem in physics section 10 paragraph 35 el

35. In the space between the plates of a plane air capacitor placed a glass condenser with a large area of the plates. To determine the capacity of the system, where: S1 = plate area of 300 cm2, S2 = 600 cm2, d1 = 4 mm, d2 = 3 mm. The thickness of the glass plates of the capacitor neglected.