Over the whole trip, your car will consume
(300,030,003,000 / 100,100,100) x (666) = 1,996,201.622 liters of gas.
At an average cost of $1.20 per liter, you should be prepared
to cough up $2,395,441.95 just for gas during the trip.
Note: That distance is a little bit more than 1,000 round trips to
the sun and back. Honestly, I don't think you'll have time for the
whole trip, and I'm pretty sure your car won't make it either.