Convert from carat [metric] to electron

Unit Definition (carat [metric])
A metric carat defined in 1907 to be exactly 200 milligrams.

Unit Definition (electron)
The electron is the mass of the electron, often used as a unit of mass in particle physics. An electron has a mass of about 9.109 382 x 10E-31 kilogram, 9.109 382 x 10E-28 gram, or 0.510 9989 million electronvolts.