Example:
15 meter per US gallon = 3.962581e-12 Tm/L
1 meter per US gallon = 2.641721e-13 Tm/L | 1 Tm/L = 3.785412e+12 meter per US gallon
Conversion Steps:
15 × (0.264172052 / 1e+12) = 3.962581e-12