from tkinter import *

window = Tk()
window.title("Mile to Km converter")
window.config(padx=20, pady=20)

def convert():
    result = float(input.get())*1.609
    output.config(text=f"{result}")

equal = Label(text="is equal to", font=("Arial", "20", "normal"))
equal.grid(column=0, row=1)

miles = Label(text="Miles", font=("Arial", "20", "normal"))
miles.grid(column=2, row=0)

km = Label(text="Km", font=("Arial", "20", "normal"))
km.grid(column=2, row=1)

output = Label(text="0", font=("Arial", "20", "normal"))
output.grid(column=1, row=1)

input = Entry(width=7)
input.grid(column=1, row=0)

button = Button(text="Calculate",command=convert)
button.grid(column=1, row=3)

window.mainloop()