from tkinter import *
root = Tk()
root.geometry("400x400")
root.resizable(0,0)
root.config(bg="#d9ead3")
root.title("Fórmula do MAF")

def app():
    div = divida.get()
    pl = Património_Líquido.get()
    a = div/pl
    maf = round((1+a),2)
    resultado.set(maf)
def limpar():
    divida_entrada.delete(0, END)
    Património_Líquido_entrada.delete(0, END)
divida_texto = Label(text="Dívida : ",bg="#d9ead3",fg="#0b5394",
               font=("Arial","12","bold"))
divida_texto.place(relx=0.28,rely=0.15)

Património_Líquido_texto = Label(text="Património Líquido : ",bg="#d9ead3",fg="#0b5394",
               font=("Arial","12","bold"))
Património_Líquido_texto.place(relx=0.05,rely=0.3)

divida = DoubleVar()
divida_entrada= Entry(textvariable=divida,
                            font=("Arial","12","bold"),
                     bg="white",fg="blue",justify='center')
divida_entrada.place(relx=0.5,rely=0.15,relwidth=0.4)

Património_Líquido = DoubleVar()
Património_Líquido_entrada= Entry(textvariable=Património_Líquido,
                            font=("Arial","12","bold"),
                     bg="white",fg="blue",justify='center')
Património_Líquido_entrada.place(relx=0.5,rely=0.3,relwidth=0.4)

but1 = Button( text="Calcular", bd=2, bg='#107db2', fg='white',
              font=('verdana', 12, 'bold'),command=app)
but1.place(relx=0.25, rely=0.55, relwidth=0.2, relheight=0.1)
but_limpar = Button( text="Limpar", bd=2, bg='#107db2', fg='white',
              font=('verdana', 12, 'bold'),command=limpar)
but_limpar.place(relx=0.65, rely=0.55, relwidth=0.2, relheight=0.1)

resultado = StringVar()
resulatdoresultado =Label(textvariable=resultado,
                          font=("Arial",12,"bold"),bg="#f0f8ff")
resulatdoresultado.place(relx=0.5,rely=0.75,relwidth=0.35)

resulatdo_texto =Label(text="MAF",
                          font=("Arial",12,"bold"),bg="#d9ead3",fg="#0b5394")
resulatdo_texto.place(relx=0.35,rely=0.75)

root.mainloop()