If you want to accumulate $51,243 to buy a cabin and if you can invest $34,164 at the rate of 7% per year, how many years will it take? Assume that the investment compounds once a year. (Do NOT include units or any text such as $, %, year, years, yr or any other character(s) in your answer. Enter your answer as the number of years rounded to 2 decimal places, e.g. 1.13 or 0.98)