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

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).

Unit Definition (gamma)
The gamma is an informal metric unit of mass equal to 1 microgram (µg).