Example:
15 Tm/L = 6.819149e+13 meter per UK gallon
1 Tm/L = 4.546099e+12 meter per UK gallon | 1 meter per UK gallon = 2.199688e-13 Tm/L
Conversion Steps:
15 × (1e+12 / 0.219968799) = 6.819149e+13