Driving from oban to stranraer a driver average 8 miles per gallon of fuel.if fuel cost 83 cents a gallon how much will the journey cost in fuel

we know that

The approx distance between Stranraer and Oban in a Driving distance is 178.90 miles
see the attached figure
so
if  a driver average 8 miles per ---------------- 1 gallon of fuel
178.90 miles---------------------------------------> X gallons of fuel
X=178.90/8-----------> X=22.36 gallons of fuel

if fuel cost $0.83 ---------------> 1 gallon
X--------------------------------> 22.36 gallons
X=22.36*0.83---------> $18.56

the answer is $18.56