The floating city of Atlantartica faces a mythic threat from sea monsters every thousand years.

• According to legend, sea monsters emerge from the depths to demand tribute from Atlantartica every thousand years.
• The current ruler, you, initially dismissed these stories until witnessing the Leviathan Lords and their minions.
• The city's army is no match for the sea monsters, and the old legends hint at a ransom of pearls to appease them.

The ruler must solve the riddle of distributing pearls to the sea monsters to save Atlantartica.

• The pearls must be divided equally among the Leviathan Lords, their krakens, and the mermite minions.
• The division must leave no pearls leftover, or the city will be dragged to the sea's bottom.
• The ruler recalls the city's ancestors prepared chests with exact counts of pearls for this event.

The ruler faces the challenge of choosing the right chest without knowing how to read the ancient numerals.

• There are five chests with varying amounts of pearls, but the ancient numeral system is unreadable.
• Time constraints make it impossible to count the pearls, and only one chest contains the correct amount.
• A wrong choice would lead to the destruction of Atlantartica.

Without deciphering the numerals, the ruler uses pattern recognition to identify the correct chest of pearls.

• The correct number of pearls must be a multiple of 7, 11, and 13, which is also a multiple of their least common multiple, 1001.
• By recognizing the pattern that any three-digit number multiplied by 1001 duplicates itself, the ruler can find the right chest.
• The ruler offers the sea monsters the correct chest, appeasing them and saving Atlantartica.