Definition: The term "rgcalc" comes from Greek, meaning "relating to numbers." In the New Testament, it refers to the practice of using Roman numerals in Hebrews 1:17, where they were used for financial and legal calculations. Specifically, in Hebrews chapter 1 verse 17, it's written: "In the beginning of our Lord Jesus Christ, when He was speaking with them concerning the foundations of the world, a great multitude came together to hear Him. And He said to them, 'Rejoice and be glad, for you are priests, ministers of the service of God.'"