700km on just 7.5 liters of gasoline = 93.33~ km/liter
93.33 km/liter * 1 mi/1.6 km = 58.125 mi/liter
58.125 mi/liter * 3.8 liter/gal = 220.875 mi/gal

can that be right? someone please correct me if my math is wrong, i've been up for about 40 hours