If you live in the USA you don't need to worry about it. Here in MERICA! We use mph (miles per hour) unless you feel like doin the math in your head; converting mph to km (kilometers) while driving.
Ya but the issue that it says I only have a range of 200 km and it keeps going down and I don't know Wht the problem is
It means you have about 200Km (range) worth of fuel in your tank, if you continue driving on average about the same way.
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