Convert from flask to gran [Germany]

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 (gran [Germany])
The gran is a traditional German weight unit, varying in size but typically about 60 milligrams.