Select the cell where you want the result to appear
Type the formula starting with =
Enter cell references, numbers, and operators as needed
Press Enter to apply the formula
Use the fill handle to copy the formula to other cells
Double-check the formula bar for accuracy
Edit the formula directly in the cell or formula bar if needed
Use relative or absolute cell references as required
Copy and paste the formula to reuse it in other locations
Use AutoFill to extend the formula across rows or columns