Example:
15 Tm/L = 4.237214e+10 mile per UK gallon
1 Tm/L = 2.824809e+9 mile per UK gallon | 1 mile per UK gallon = 3.540062e-10 Tm/L
Conversion Steps:
15 × (1e+12 / 354.00619) = 4.237214e+10