In other words, to fully charge a Leaf (24kw) @$0.65 per kw (avg), it will cost 24x0.65 = $15.6 for 75 miles or an equivalent of 3.9 gallons of fuel @ $4 per gallon, which in turn, works out to be 75/3.9 = 19.2 miles per gallon of gas!
It is worse than an average small ICE car.