Kamaz and ZMA vans are developed in Naberezhnye Chelny. Town is without doubt one of the biggest prepared metropolitan areas in the world connected with vehicles. With over 5 square kilometres (2 sq mi) for output, the Kamaz plant is the biggest motor vehicle manufacturing unit in the world.P R = V 2 × I = V R R + R C × V R + R C = R R + R C ×