Download Python from : https://www.python.org/downloads/ Download pycharm community from https://www.jetbrains.com/pycharm/download/#section=windows This is the code of my calculator for any number of multiplication tables. import tkinter as tk def show_output (): number = int (number_input.get()) output = '' for i in range ( 1 , 26 ): output += str (number) + ' x ' + str (i) output += ' = ' + str (number * i) + ' \n ' output_label.configure( text =output) window = tk.Tk() window.title( 'Multiply list formula' ) window.minsize( width = 360 , height = 440 ) title_label = tk.Label( master =window , text = 'Number' ) title_label.pack( pady = 20 ) number_input = tk.Entry( master =window , width = 22 ) number_input.pack() go_button = tk.Button( master =window , text = 'is' , command =show_output , width = 20 , height = 2 ) go_button.pack( pady = 20 ) output_label = tk.Label( master =window) out