Basically, you want us to reverse-engineer a screenshot and find algorithm which leads from input to output?

If possible, ask author(s) of "another software", they know.

the problem is that the field where I use formula cannot enter value into database

Quote:

the problem is that the field where I use formula cannot enter value into database

Why not? Is that field based on a table column (and the block based on the table)? If so, it *should* work simply by committing changes you've made.

Otherwise, it depends on what the form actually does, what it is based on, and what processing you do. Perhaps you'll have to store that value manually (e.g. by creating a PRE-INSERT trigger, or write an ON-INSERT trigger), or call a procedure which will do that for you, or ...