The billionaire with the return multiplier system.

Janah was born into a middle-class Jackson family. Unfortunately, he was not good at academic achievement and ended up being ridiculed in the family. He activated the God-tier return multiplier system. [Ding, you have bought food with a $5, x10 return. [You receive $50.]
[ Ding, You have bought drinks with a $7 or $10 return. [You receive $70.]
You trained in boxing for 5 minutes, x 100 returns. [You receive 500 minutes of proficiency in boxing.]
You learn mathematics for 1 hour, x 100 returns. [You receive 100 hours of proficiency in mathematics.]
Janah could receive a return of any practical thing he have done. Let'followed Janah through his journey and see how he becomes the most powerful and richest man to ever live.