Area calculation is the process of determining the size of a two-dimensional surface. It is commonly used in various fields such as mathematics, architecture, and land surveying. The area is typically measured in square units, such as square meters or square feet, depending on the measurement system used. To calculate the area of simple shapes, specific formulas are applied. For example, the area of a rectangle is found by multiplying its length by its width, while the area of a circle is calculated using the formula πr², where r is the radius. Understanding these calculations is essential for practical applications in everyday life.