from tkinter import *
root = Tk()
root.title("Calcular m²")
root.configure(bg="#f3f6f4")
root.geometry("300x300")
def limpar():
    lado1_entrada.delete(0, END)
    lado2_entrada.delete(0, END)
def app():
    l1 = lado1.get()
    l2 = lado2.get()
    mquadrado = l1 * l2
    mensagem = f"O Terreno tem {mquadrado} m²."
    resultado.set(mensagem)
titulo =Label(text="Calcular Metros quadrados",
              font=("Arial",15,"bold"),bg="#f3f6f4",fg="#cc0000")
titulo.place(relx=0.05,rely=0.05)
texto1 =Label(text="Lado 1 : ",
              font=("Arial",12,"bold"),bg="#f3f6f4",fg="#cc0000")
texto1.place(relx=0.15,rely=0.25)
lado1 = DoubleVar()
lado1_entrada= Entry(textvariable=lado1,font=("Arial","12","bold"),
                     bg="white",fg="green",justify='center')
lado1_entrada.place(relx=0.45,rely=0.25,relwidth=0.2)

texto2 =Label(text="Lado 2 : ",
              font=("Arial",12,"bold"),bg="#f3f6f4",fg="#cc0000")
texto2.place(relx=0.15,rely=0.45)
lado2 = DoubleVar()
lado2_entrada= Entry(textvariable=lado2,font=("Arial","12","bold"),
                     bg="white",fg="green",justify='center')
lado2_entrada.place(relx=0.45,rely=0.45,relwidth=0.2)
butao_calcular = Button(root, text="Calcular", bg="#466a8d",
                       font=("Arial","12","bold"),fg="white"
                       ,command=app)
butao_calcular.place(relx=0.2,rely=0.6)
butao_limpar = Button(root, text="Limpar", bg="#466a8d",
                      font=("Arial","12","bold"),fg="white"
                      ,command=limpar)
butao_limpar.place(relx=0.5,rely=0.6)
butao_exit = Button(root, text="Sair", bg="#466a8d",
                      font=("Arial","12","bold"),fg="white"
                    ,command=root.destroy)
butao_exit.place(relx=0.8,rely=0.6)
resultado = StringVar()
vresultado = Label(textvariable=resultado,font=("Arial",12,"bold"),
                   bg="#c0ccc0",fg="green")
vresultado.place(relx=0.05,rely=0.75,relwidth=0.9)
root.mainloop()