For an electric field passing through a flat surface perpendicular to it, the electric flux of the electric field through the surface is the product of the electric field's strength and the area of the surface. A certain flat surface consists of two adjacent squares. The side length, in meters, of the larger square is 2 times the side length, in meters, of the smaller square. An electric field passes uniformly through this surface, which is perpendicular to the electric field. If the electric flux of the electric field through the larger square is 1,200 volts \cdot meters, what is the total electric flux, in volts \cdot meters, through the entire surface?