print(" Hello\n enter the activity to be performed")
activity = input()
if ( activity=="calculate"):
    print("CHOSE ONE ACTIVITY TO BE PERFORMED")
    print("MULTIPLICATION\nADDITION\nSUBTRACTION\nDIVISION")
    activity2=input()
    if (activity2=="multiplication"):
     print("enter your first number please")
     first_number =int (input())
     print("enter your second number please")
     second_number =int (input())
     print("{}*{}" .format (first_number*second_number))
    elif(activity2 =="addition"):
     print("enter your first number")
     first_number =int (input())
     print ("enter your second number")
     second_number = int (input())
     print("{}+{}".format (first_number + second_number))
    elif (activity2 == "subtraction"): 
     print("{}-{}".format (first_number - second_number))
    elif (activity2 == "division"):
     print("enter yoyr first number")
     first_number = int (input())
     print("enter your second number")
     second_number = int (input())
     print("{} / {}". format (first_number/second_number))
    else:
     print("the option is not exist")


else:
  print("activity not exist")
print("activity completed")  
