Tyrant calculation formula! Have you forgotten?

The formula for calculating the qualifications of local tyrants, have you calculated it? I calculated it myself, just like netizens said, at most, it is called a turtle, only half of the soil, and there is no Hao.

First calculate the Decent Index (Decent Index = 1 - Decent Expenditure/Income), and then if the index is greater than 0.7, congratulations, you are a local tyrant through and through!