Russia uses the metric system. Here are the main units you'll learn in this course:
Square («квадратный») meters and kilometers are used for areas (м², км²).
To speak about an object of a certain length/weight etc., the Instrumental form of a quality is used:
To express the idea of a certain activity "covering" a certain space or time interval, verbs with the prefix «про-» are often employed. Of course, you should consult the dictionary to know if a certain verb of this structure exists or has that particular meaning.
It is different from verbs of motion like "пройти" because many other verb can have this prefixs:
NOTE about VERBS OF MOTION: some of these derivatives will not be verbs of motion and actually can differ in stress or form (проезжа́л/прое́здил). We are only covering distances here. You see, when talking about motion, the derivative of the one-way verb is used for distance. For times, you use just the multidirectional verb, or, if you want to put an emphasis on how extremely long it took, its про-prefixed derivative:
The проходи́л, пробе́гал, прое́здил options are not neutral in style but are encountered in spoken speech anyway.