An odometer in a car is broken and only registers 6 miles when the car has traveled 7 miles. If the odometer registers 1137 miles, how far did the car really travel?

I'm not sure if this is a trick question but, if I was to assume my answer would be 1136. If it is a trick question, if the odometer only registers 6 miles then it'd either be 189.5m or 6 miles because it only registers 6 miles so it wouldn't change.