The formula of three plum blossoms in abacus calculation

The formula of three plum blossoms in the abacus means to add more when you see it, which means "three plum blossoms for four people to see".

The specific operation steps are as follows:

1. Dial "106885688569" on the abacus, where "0" is a position above the abacus, also called "interval".

2. Then "see the pearl", that is, "add whatever you see", for example, add "1" when you see "1", add "6" when you see "6", and so on until you get "1710655".

I hope the above information can help you solve the problem. Please feel free to let me know if you have any other questions.