Convert from flask to carat [metric]

Unit Definition (flask)
The flask is a commercial unit of weight formerly used to measure liquid mercury (or quicksilver, as it was called). The flask was equal to 76.5 pounds avoirdupois, which is equivalent to almost exactly 34.7 kilograms.

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