What does 1 Chronicles 20:3 mean?

And he brought forth the people that were therein, and cut them with saws, and with harrows of iron, and with axes. And thus did David unto all the cities of the children of Ammon. And David and all the people returned to Jerusalem.

And he brought out the people that were in it, and cut them with saws, and with harrows of iron, and with axes. Even so dealt David with all the cities of the children of Ammon. And David and all the people returned to Jerusalem.

And he brought forth the people that were therein, and cut them with saws, and with harrows of iron, and with axes. And thus did David unto all the cities of the children of Ammon. And David and all the people returned to Jerusalem.

And he took the people out of the town and put them to work with wood-cutting instruments, and iron grain-crushers, and axes. And this he did to all the towns of the children of Ammon. Then David and all the people went back to Jerusalem.

and the people who <FI>are<Fi> in it he hath brought out, and setteth to the saw, and to cutting instruments of iron, and to axes; and thus doth David to all cities of the sons of Ammon, and David turneth back, and all the people, to Jerusalem.

And the people that were therein he brought out: and made harrows, and sleds, and chariots of iron to go over them, so that they were cut and bruised to pieces: in this manner David dealt with all the cities of the children of Ammon: and he returned with all his people to Jerusalem.

And he brought out the people that were in it, and cut them with the saw, and with harrows of iron, and with saws. And so David did to all the cities of the children of Ammon. And David and all the people returned to Jerusalem.