This is the first time I have heard any suspicion that there is something wrong with the calculator. I can tell you for sure that the calculator's calculation results are accurate, except after the decimal point. Financial calculators can only be accurate to yuan. However, the problem lies with people and policies. Adjustments in policies such as interest rates are inevitable, but as for people, you have to be more careful. After all, people rely on you to give them money to make money. So, if you want to have more layers, just keep an extra concentration.