Convert from baht [Thailand] to libra [ancient Rome]

Unit Definition (baht [Thailand])
The baht [Thailand] is a traditional weight unit in Thailand, now equal to exactly 15 grams or 1/40 catty (0.5291 ounce). The baht, originally the weight of a silver coin of the same name, is used to measure the weight of precious metals. The unit is pronounced bot.

Unit Definition (libra [ancient Rome])
The libra [ancient Rome] is a traditional unit of weight. The libra was the Roman unit from which the English pound is descended; the symbol "lb" for the pound comes from this unit. The Roman libra contained only 12 unciae (ounces) and was about 0.722 English pound. The word "libra" is sometimes used now for the kilogram, a much larger unit.