Two large speakers broadcast the sound of a band tuning up before an outdoor concert. The speed of sound on this particular day is 336.2 m/s. While the band plays a note with a frequency of 410 Hz, Nick walks to the concession stand along a line parallel to the line between the two speakers. If the speakers are separated from each other by 4.1 meters and the line between them is 24.0 meters from Nick, how far must he walk between "loud" spots?