One litre is .26417205235814844 of a gallon
one gallon divide by .26417205235814844 = 3.7854
so there are 3.78 Litres per gallon
@.859 per litre x 3.78 = $3.25 per gallon in Aussie dollars
.7 x 3.25 = $2.275 in American dollars, approximately that is using the given conversion rate.