I looked up the Talmud number you listed but don’t understand it. Can you please explain to me?

"Two people were traveling, and [only] one of them had a canteen of water. [There was only enough water so that] if both of them drank they would both die, but if one of them drank [only] he would be able reach an inhabited area [and live]... Rabbi Akiva came and taught: '"Your brother should live with (!) you" (Vayikra 25:36) - your life takes precedence over the life of your friend.'" (Bava Metzia 62a)