text: from tkinter import*
  
  root=Tk()
      
  root.geometry("644x900")
  """root.title("Calculator by Tarun Jaiswal")
  scvalue=StringVar()
  scvalue.set("")
  
  screen=Entry(root,textvar=scvalue,font="lucida 40 bold")
  screen.pack(fill=X, ipadx=8, pady=10, padx=10
  """
  
  root.mainloop()