What is a short summary of "beowulf"?

Beowulf’s first major battle was against Grendel, a monster that had been terrorizing the Scyldings. Beowulf heard about Grendel’s murderous spree in the land of the Danes under King Hrothgar and decided to come to their aid. Beowulf fights Grendel in a mead hall at Herot and tears off the monster’s arm, mortally wounding it. Grendel’s mother attacks the Danes in revenge but Beowulf follows the monster back to her lair and kills it. Beowulf goes back home to the Geats and becomes their King. Fifty years after his last battle with Grendel’s mother, Beowulf is forced to fight a dragon after a slave steals a golden cup from its lair. This last battle is however difficult for Beowulf who receives help from one of his men and the two finally defeat the dragon. During the battle with the dragon Beowulf was mortally wounded. The hero dies soon after and is buried ceremoniously at sea

99, multiply all the sides