A 20-year-old individual has been calculating Khums since reaching maturity but has been doing it in a specific way. Upon marriage, their spouse informed them that their method was incorrect. They were calculating their assets and money, for example, 2000 Dinars, and extracting 400 Dinars, considering the remaining amount (1600 Dinars) as the base for Khums. They had heard that the base amount is removed in the following year, so when calculating their assets the next year, if it increased to 4000 Dinars, they would subtract the 1600 Dinars from the previous year, leaving 2400 Dinars to calculate Khums on for the new year. They seek a prompt response to avoid missing out further.