How is GDP calculated?

To calculate GDP, it is necessary to sum up the value of all goods and services produced in a given country in a specified period of time (usually a year). There are three main methods of calculating GDP: the production method, which involves summing up the value added by individual sectors of the economy; the income method, which involves summing up the incomes generated by workers and business owners in the country; and the expenditure method, which involves summing up all investment expenditures, consumption, and government expenditures in the country. The final GDP value is calculated by comparing the results obtained using the above methods, which allows for a more precise result.