in one year

"each year." This refers to every year of Solomon's reign, and not to just one time.

666 talents of gold

"six hundred sixty-six." A talent is a unit of weight equal to about 33 kilograms. Alternate translation: "almost 22,000 kilograms of gold" (See: rc://en/ta/man/translate/translate-numbers and rc://en/ta/man/translate/translate-bweight)