Example:
15 metric horsepower-hour = 3.971693e+14 erg
1 metric horsepower-hour = 2.647796e+13 erg | 1 erg = 3.776727e-14 metric horsepower-hour
Conversion Steps:
15 × (2647795.5 / 1e-7) = 3.971693e+14
