What’s that dream figure that can enable you to retire early? For Arun, who is planning to go back to his village after retirement, it’s Rs. 1 crore. When he told his friends that he plans to amass that amount of money in 15 years by investing Rs. 15,000 a month, a lot of people said it was impossible, but he had math on his side. He took refuge in the 15x15x15 rule to plan and calculate his investment to reach his dream figure. But what is the 15x15x15 rule and how does it work? Let’s follow Arun’s journey to understand it better.