Where does the idea of the evil ring originate in lord of the rings

Explanation:

forged by the Dark Lord Sauron during the Second Age to gain dominion over the free peoples of Middle-earth

we know that, volume of a rectangular prism is given by :

✿   {length × width × height}

given : the length of rectangular prism = 5.5

given : the width of rectangular prism = 6

given : the height of rectangular prism = 3

⇒ the volume of given rectangular prism = {5.5 × 6 × 3}

⇒ the volume of given rectangular prism = 99

may i see the historical information and the excerpt?