A couple of two-way radios were purchased from different stores. Two-way radio A can reach 3 miles in any direction. Two-way radio B can reach 6.44 kilometers in any direction.
To convert the range of two-way radio B from kilometers to miles, we can use the conversion factor 1 kilometer is equal to 0.621371 miles.
6.44 kilometers * 0.621371 miles/km = 4 miles
Therefore, two-way radio B has a range of 4 miles in any direction.