from tkinter import *

window=Tk()

def km_to_miles():
    print(e1_value.get()) 
    miles = float(e1_value.get())*1.6
    t1.insert(END, miles)        # insert method into the t1 object


b1=Button(window, text="Execute",command=km_to_miles)


b1.grid(row=0, column=0)

e1_value = StringVar()
e1=Entry(window, textvariable=e1_value)
e1.grid(row=0, column=1)

t1=Text(window,height=1,width=20)
t1.grid(row=0,column=2)


window.mainloop()

