A cylinder with a base circumference of 8 decimeters can be expanded laterally to form a square. The side area of the cylinder is______ Square decimeter?

A cylinder with a base circumference of 8 decimeters can be expanded laterally to form a square. The side area of the cylinder is______ Square decimeter?

According to the meaning of the question, the circumference and height of the bottom of the cylinder are equal, that is, its height is 8 decimeters, and its side area is 8 × 8 = 64 (square decimeters); answer: the side area of the cylinder is 64 square decimeters; so the answer is: 64