In Excel, you can calculate by selecting cells and entering formulas. Formulas usually start with an equal sign =, followed by the expression to be evaluated. Excel supports various mathematical operators (such as plus sign, minus sign, multiplication sign, division sign, etc. ) and functions (such as SUM, AVERAGE, MAX, min, etc. ), can be used in combination as needed. Other cell values can also be referenced in the formula, and the corresponding data can be obtained by using cell references (such as A 1, B2). After entering the formula, press Enter to get the calculation result. Excel will automatically update the values of the cells referenced in the formula and display the final calculation results.