how do i solve this

You take an offer for a 30-year mortgage of $140,000. The Bank of Montreal offers you the following deal: instead of making the monthly payment of $825.12 every month, you can make half the payment every two weeks (so that you will make 522=26 payments a year). How long will it take to pay off the mortgage if the EAR on the loan is 6.00% ? (Note: Be careful not to round any intermediate steps less than six decimal places.) The amount of time to pay off the loan is weeks. (Round to the nearest integer.)