The side length of square glass is 8 decimeters. Now there are 9 pieces of such glass. How many square decimeters do they have in total? How to explain to children

The side length of square glass is 8 decimeters. Now there are 9 pieces of such glass. How many square decimeters do they have in total? How to explain to children

The area of a square is the length of the side multiplied by the length of the side to get the area of one: 8 × 8 = 64, nine of which is 64 × 9 = 576