Calculation is the process of using mathematical methods to determine a value or solve a problem. It involves basic operations such as addition, subtraction, multiplication, and division. Calculations can be performed manually or with the help of tools like calculators and computers. In everyday life, calculations are essential for budgeting, measuring, and planning. For example, when shopping, people often calculate the total cost of items or discounts. In fields like science and engineering, accurate calculations are crucial for experiments and designs, ensuring that results are reliable and effective.