The tallest building in Maggie's home town of Mule Shoe, Texas is three stories tall. She wants to know the actual height of the building. Maggie, who is 5 feet tall, started walking away from the building until the tip of her shadow lined up exactly with the tip of the building's shadow. When the shadows lined up, Maggie was 36 feet from the building and her shadow was 6 feet long. How tall is the building?