The king has spent all of his earning to buy the latest car. However, he don't have money now and tax season is not yet due. e would have to find another mean to make money. Luckily, he found someone willing to pay him for some experiment.
Drive your car as fast as you can. Try not to damage your car. Anyway, the car will be damage because of the tough terrain. You earn money based on the distance you traveled and the money you collected while driving. Use the money to upgrade your car and see how far you go.