from tkinter import *
import random

root = Tk()
root.resizable(width=False, height=False)
root.title("Programm name")
root.geometry("420x338+300+300")
calculated_text = Text(root,height=15, width=50)

def name_fun2clear():
    calculated_text.delete('1.0', END)

pass

def name_function():
    pass

display_button = Button(text="text1", command=name_function)
erase_button = Button(text="text2", command=name_fun2clear)

number_entry = Entry(width=10, justify=CENTER)
length_entry = Entry(width=10, justify=CENTER)
number_entry.insert(0, "10")
length_entry.insert(0, "15")

number_label = Label(text="      Кп")
length_label = Label(text="      Дл")
number_label.grid(row=0, column=0, sticky="w")
length_label.grid(row=1, column=0, sticky="w")
number_entry.grid(row=0,column=1, padx=1, pady=5)
length_entry.grid(row=1,column=1, padx=1, pady=5)

display_button.grid(row=2, column=0, padx=5, pady=5, sticky="e")
erase_button.grid(row=2, column=2, padx=15, pady=5, sticky="w")
calculated_text.grid(row=4, column=0, sticky='nsew', columnspan=3)

scrollb = Scrollbar(root, command=calculated_text.yview)
scrollb.grid(row=4, column=4, sticky='nsew')
calculated_text.configure(yscrollcommand=scrollb.set)