How many gallons of gas are needed for their car to travel 1,869 ​miles?

Answer 1

Your question is incomplete. You have to state the average fuel consumption of the car in mpg ( miles per gallon).

For example: if the car consumes 1 gallon of gas per 33 mile or 33 mpg :

(1896 miles) * (1 gallons)/33 mile = 1896/33 gallons = 57 gallons

Hope that helps