Вот решение на COBOL, под питон сам поправь IDENTIFICATION DIVISION.
PROGRAM-ID. AddDivideProgram.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 A PIC 9(5).
01 B PIC 9(5).
01 C PIC 9(5).
01 RESULT PIC 9(5)V9(2).
PROCEDURE DIVISION.
DISPLAY "Enter value for A: ".
ACCEPT A.
DISPLAY "Enter value for B: ".
ACCEPT B.
DISPLAY "Enter value for C: ".
ACCEPT C.
IF C = 0
DISPLAY "Error: Division by zero is not allowed."
ELSE
COMPUTE RESULT = (A + B) / C
DISPLAY "Result: " RESULT
END-IF.
STOP RUN.