Example:
15 fuel oil equivalent @ barrel (US) = 9.574632e+10 J
1 fuel oil equivalent @ barrel (US) = 6.383088e+9 J | 1 J = 1.56664e-10 fuel oil equivalent @ barrel (US)
Conversion Steps:
15 × (6.383088e+9 / 1) = 9.574632e+10