Furlongs per Fortnight - Unit Conversion by LuskT

Question 4

One neat fact (among many) I learned from xkcd's "What If?" is that gas mileage ultimately has units of inverse area (i.e., 1/length^2). This means a fuel economy of 20 miles per gallon is equivalent to how many inverse square feet (1/ft^2)?

789,888 (766,191 to 813,585 acceptable) (edited at 3:29 am, September 2, 2015 (PDT))

Original Answer: 14,117 (13,694 to 14,541 accepted)

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