7 is related to 40 by certain logic. Following the same logic, 5 is related to 16. To which of the following is 9 related, following the same logic? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits, E.g., 13 - Operations on 13 such as adding/subtracting/multiplying/etc., to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)