Example:
15 nautical mile per US gallon = 3.962581 n.mile/L
1 nautical mile per US gallon = 0.264172 n.mile/L | 1 n.mile/L = 3.785412 nautical mile per US gallon
Conversion Steps:
15 × (489.5755247 / 1853.24496) = 3.962580786