Tkinter-এ Entry.get() কে ইন্টিজারে কনভার্ট করা

from tkinter import *

win = Tk()
win.geometry("700x350")

def cal_sum():
    t1 = int(a.get())
    t2 = int(b.get())
    sum_val = t1 + t2
    label.config(text=sum_val)

Label(win, text="Enter First Number", font=('Calibri 10')).pack()
a = Entry(win, width=35)
a.pack()
Label(win, text="Enter Second Number", font=('Calibri 10')).pack()
b = Entry(win, width=35)
b.pack()

label = Label(win, text="Total Sum: ", font=('Calibri 15'))
label.pack(pady=20)
Button(win, text="Calculate Sum", command=cal_sum).pack()

win.mainloop()