Possible Clues:

• Mathematical operation that may have a remainder
• Sounds like a lengthy queue in The Barracks for some of the tables
• San Andreas Fault?
• Exercise taught in school produced drawn-out group of servicemen
• (Pre-calculator) arithmetical process
• Process that may end with a remainder
• Not a short class in arithmetic
• Mathematical operation
• Dealing with large numbers in tedious disagreement
• One way to calculate result of vendetta?