The formula for the area of a rectangle is A = l × w, where A represents the area, l is the length, and w is the width of the rectangle.
To understand this formula, consider that the area is essentially measuring the amount of space contained within the rectangle. By multiplying the length by the width, you are calculating how many unit squares can fit inside the rectangle. For example, if the length of a rectangle is 5 units and the width is 3 units, the area would be A = 5 × 3 = 15 square units.