gasolineWeight :: (Fractional f) 
  => MkQu_DLN D.Length su f -> PerArea su f -> MkQu_DLN D.Density su f -> MkQu_DLN D.Mass su f
gasolineWeight len0 ef0 den0 = len0 |/| ef0 |*| den0
gasolineWeight :: (Fractional f) 
  => MkQu_DLN D.Length su f -> PerArea su f -> MkQu_DLN D.Density su f -> MkQu_DLN D.Mass su f
gasolineWeight len0 ef0 den0 = len0 |/| ef0 |*| den0
gasolineWeight len0 ef0 den0 = len0 |/| ef0 |*| den0