Convert from chin [China] to firkin [butter, soap]

Unit Definition (chin [China])
The chin [China] is one of several spellings in English for the jin, a traditional Chinese weight unit.

Unit Definition (firkin [butter, soap])
The firkin [butter, soap] is a traditional unit of weight for butter and soap, equal to 4 stone or 56 pounds (about 25.40 kilograms).