Convert from gamma to oka, oke [Turkey]

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

Unit Definition (oka, oke [Turkey])
The oka, oke [Turkey] is a traditional unit of weight in Turkey and throughout the eastern Mediterranean. The oka is approximately 2.8 pounds or 1.28 kilograms, although its size varied somewhat over the large area formerly included in the Turkish empire.