There is a point on the sphere, and its distance to all points on the sphere is equal. This point is called the center of the sphere. The line segment connecting the center of the sphere to each point on the sphere is called the sphere radius, and the sphere area is the sphere radius multiplied by the radius, then multiplied by the pi, and then multiplied by 4.
The line segment passing through the center of the sphere with both ends on the sphere is called the spherical diameter; The volume of a ball can be multiplied by three times the diameter of the ball, then multiplied by pi, and finally divided by 6.
I hope it can help you solve the problem.