What does 1 Chronicles 7:2 mean?

Tola's sons were Uzzi, Rephaiah, Jeriel, Jahmai, Ibsam, and Shemuel. They led their families, and in David's time, their descendants numbered 22,600. 1 Chronicles 7:2 - Modern Text Bible

(Tola's line is detailed, showing the growth and leadership of his family, with a census from King David's era.)