text: from tkinter import *
  from math import *
  
  from sciencalc import *
  from simplecalc import *
  
  content=""
  
  root=Tk()
  root.geometry("700x700")
  simple_button=Button(root,text="Simple Calculator",font="Calibri 12",fg="black",bg="white",padx=10,pady=10,command=lambda:root1.mainloop(),height=3,width=10)
  simple_button.place(x=200,y=350)
  scien_button=Button(root,text="Scientific Calculator",font="Calibri 12",fg="black",bg="white",padx=10,pady=10,command=lambda:root2.mainloop(),height=3,width=10)
  scien_button.place(x=400,y=350)
  exit_button=Button(root,text="Exit",font="Calibri 12",fg="black",bg="white",padx=10,pady=10,command=lambda:exit(),height=2,width=6)
  exit_button.place(x=600,y=50)
  
  root.mainloop()
  
  
  
       
  
  