new_contents: __author__ = 'วรรณพงษ์'
  #import re
  print("Text")
  a = input("Text")
  if a.find("+"):
      s = a.split("+")
      in1 = int(s[0])
      in2 = int(s[1])
      cal = in1 + in2
  elif a.find("-"):
      s = a.split("-")
      in1 = int(s[0])
      in2 = int(s[1])
      cal = in1 - in2
  elif a.find("*"):
      s = a.split("*")
      in1 = int(s[0])
      in2 = int(s[1])
      cal = in1 * in2
  elif a.find("//"):
      s = a.split("//")
      in1 = int(s[0])
      in2 = int(s[1])
      cal = in1 // in2
  else:
      cal = "error";
  print(cal)
  
subject: Create บวกลบธรรมดา.py