You're bragging to your friend from canada that your new hybrid car gets great gas mileage. you tell him you get 50 miles per gallon, and he says that's nothing: "i get 23 kilometers per liter in my new car". does he actually get better gas mileage than you

(23 km/L) · (3.785 L/gallon) · (1 mile/1.609344 km) =

(23 · 3.785 · 1 / 1.609) · (km · Liter · mile) / (Liter · gallon · km) =

54.1 mile/gallon .

The Canadian's car is more fuel efficient than your car is.  

This should not surprise you.  The average cost of gasoline in Canada right now (October 2018) is a little over USD3.80 a gallon, compared to $2.60 in the US.