Origin of the product:
"Tian Han Wen Zhi Shi": "Anyone who is well-known in the picture album often lives in the Chinese and foreign officials 1 18 in the stars, with a total of 780 stars, all of which have the image of the state official palace."
Tang Hanyu's "On the Matters of Changing Salt Law": "A catty of salt, the official money is thirty. In fact, a catty is 28, and a catty is 26, which makes up for my own shortcomings. A catty of money is only 267, and the people make up for one person. A pound of money is three or four, which means that a pound of public and private leisure often loses seven or eight. If you are not as good as the people, you will not be returned to the official. At most, many a mickle makes a mickle. "
Correlation calculation of product number:
Product interest method: the method of accumulating account balance every day according to the actual number of days and multiplying the accumulated products by the daily interest rate to calculate interest.
The interest formula is: interest = accumulated interest product × daily interest rate.
Cumulative interest-bearing product = total daily balance; Interest rate for a few days = annual interest rate /360.
The difference between the current new product interest-bearing method and the original product interest-bearing method: the original product interest-bearing method is calculated according to 30 days per month and 360 days per year; The new product interest method calculates interest according to the actual number of days (365 or 366 days a year).