I am going to assume that you are referring to the formula "e = mc^2"
in this case e is not a distance, but stands for energy. In the formula m stands for mass and c stands for the speed of light squared. This means that the total energy in anything is the mass of the object times the speed of light squared.
670 meters equals 670 meters.
98 meters equals how many millimeters?
10000 equals 10000 meters
3 km equals how many meters? 38
Two kilometers equals 2000 meters.
300 meters?
728 centimeters equals 7.28 meters.
3000 milimeters equals 3 meters.
about 100.6 meters.
200 meters
0.689 meters
0.983 meters