The ratio of the surface area of a sphere tangent to each surface of a cube to that of a cube is______

The ratio of the surface area of a sphere tangent to each surface of a cube to that of a cube is______

Let the radius of the ball be r, then the surface area of the ball is 4 π R2, the surface area of the cube is 6 × (2R) 2 = 24r2, so the ratio of the surface area of the ball to the surface area of the cube is: π 6, so the answer is: π 6