DISTANCE calculates the distance between two points. Latitude and longitude are expected to be in decimal units. Always use a comma and a space to separate numeric values. This is necessary to accommodate languages that use a comma as a decimal separator, as shown in the second example below.
DISTANCE (18,529747, 73,839798, 18,533511, 73,8777995, KILOMETERS, 1) returns the value 4,0 kilometers.