import tkinter

win = tkinter.Tk()

def do_calc():
    op1 = float(operand1.get())
    op2 = float(operand2.get())
    
    op = ope.get()
    
    if op=="+":
        res = op1+op2
    elif op=="-":
        res = op1-op2
    elif op=="*":
        res = op1*op2
    else:
        res = op1/op2

    result.config(text=f"Result: {res}")


operand1 = tkinter.Entry(win)
operand2 = tkinter.Entry(win)
operand1.pack()
operand2.pack()

frame = tkinter.Frame(win)
frame.pack(side=tkinter.LEFT)

ope=tkinter.StringVar()
ope.set("-")
radio1 = tkinter.Radiobutton(frame, text="+", variable=ope, value="+")
radio2 = tkinter.Radiobutton(frame, text="-", variable=ope, value="-")
radio3 = tkinter.Radiobutton(frame, text="*", variable=ope, value="*")
radio4 = tkinter.Radiobutton(frame, text="/", variable=ope, value="/")

radio1.pack(); radio2.pack(); radio3.pack(); radio4.pack()

calc = tkinter.Button(win, text="Calc!", command=do_calc)
result = tkinter.Label(win, text="Result: ")

result.pack(side=tkinter.BOTTOM)
calc.pack(side=tkinter.BOTTOM)


win.mainloop()