Example:
15 mile per UK gallon = 5.310093e-12 Pm/L
1 mile per UK gallon = 3.540062e-13 Pm/L | 1 Pm/L = 2.824809e+12 mile per UK gallon
Conversion Steps:
15 × (354.00619 / 1e+15) = 5.310093e-12