Answer
$7.26$ dollar per gallon
Work Step by Step
1. Convert liters to gallons, using conversion $1L = 3.7854 gallons$
$ 1.42 \frac{euro}{litre} \times 3.7854 \frac{litre}{gallon} = 5.375$ $euro/gallon$
2. Convert from euro to dollars
$1 dollar = 1.35 euro$
$ 5.375\frac{euro}{gallon}\times 1.35\frac{dollar}{euro} = 7.26$ $dollar/gallon$
