Anyone who drives has observed over the last few years many gas stations putting in new modern pumps which count gas in 1/1000 of a gallon. I have done some calculations. A car that gets 20 miles per gallon goes 20 x 5280 feet or 105,600 feet on one gallon of gas. That means that every time that far right number on the new gas pumps moves 1 digit you get enough gas to move your car 105.6 feet. Now aren't you glad those gas stations put in those new pumps ( at what must have been great expense ) so the customer can watch the far right digit move so fast and create the illusion of getting more gas?

  Links:
How Gas Prices Work
At this web site you can find out that world prices range from $6.99 per gallon in Oslo, Norway to 12 cents a gallon in Caracas, Venezuela
Fuel Cost Calculator

There are lots of other good gas price web sites if you are willing to put in the time and effort to look for them