The number of 3 digited numbers that can be formed using {1, 2, 3, 4, 5} any number of times is

Consider 3 blanks . Each blank can be filled with any one of the given 5 numbers in 5 ways. So the 3 blanks can be filled in 5×5×5 ways.The number of 3 digited numbers that can be formed using {1, 2, 3, 4, 5} any number of times is =53=125