You are at an outdoor event and you can barely hear the sound from the stage. You are standing an unknown distance, D, from the stage. If the decibel level is 65 dB at this location, where would you need to stand for the decibel level to be 90 dB? Give your answer as a numeric multiple of the unknown distance, D, in decimal form. (For example, if the answer is D/2, you would enter 0.5)