Example:
15 meter per US gallon = 3.962581e-15 Pm/L
1 meter per US gallon = 2.641721e-16 Pm/L | 1 Pm/L = 3.785412e+15 meter per US gallon
Conversion Steps:
15 × (0.264172052 / 1e+15) = 3.962581e-15