Convert from gros to obol, obolos, obolus [Greece]

Unit Definition (gros)
The gros is a traditional French weight unit equal to 3 deniers (about 3.824 grams).

Unit Definition (obol, obolos, obolus [Greece])
The obol, obolos, obolus [Greece] is a historic unit of weight or mass. The obol is a very small weight that originated as the weight of a tiny Greek coin. In modern Greece, the obolos is an informal name for the decigram (0.1 gram).