A map has a scale of 1:50,000, where 1 unit on the map represents 50,000 units in real life. If the distance between two cities on the map is 3 inches and the real-life distance between the cities is twice the distance between another pair of cities that are 2 inches apart on the same map, what is the real-life distance between the two cities that are 2 inches apart? Let's think step by step and output the final answer within \boxed{}.
user