Sorry I expressed myself badly.
Example:
fieldname42 = x (calculated field)
fieldname82 (dropdown)
value = y
value = z
value = w
It is necessary to have a calculated field that gives me (q):
if x = 10
y = 8
z = 11
w = 15
q = 11
if x = 12
y = 8
z = 11
w = 15
q = 15
thank you