Final answer:
To solve for the unknown number of years using a calculator in Excel, input three numbers: the first year, the purchasing power amount, and the last year. Use the FV function in Excel to calculate the number of years.
Step-by-step explanation:
To solve for the unknown number of years using a calculator in Excel, you need to input three numbers: the first year (e.g., the year of your birth), the amount of money you want to translate in terms of its purchasing power, and the last year (the most recent year the calculator will accept). Once you have entered this data into Excel, you can perform calculations.
For example, if you want to calculate the number of years it takes for money to double at a certain interest rate, you can use the FV function in Excel. Enter the interest rate, the present value, and the future value (which is double the present value) into the formula, and Excel will calculate the number of years.