Hello Bes
Tried different way, do not get an idea how to get it to work and didn't found any documentations. Could you please help.
Idea is to get exchange rate, but not complicated. field_b is exchange rate which is static and user inserts only one value in field_a in and then field_c shows result by multiplying field_a with field_b.
Result in frontend:
field_a value
field_c value
Thank you