from tkinter import *
root = Tk()
root.geometry("400x400")
root.resizable(0, 0)
root.config(bg="#103030")
root.title("Watts")
titulo = Label(text="Watts",
               font=("Arial", "30", "bold"), bg="#103030", fg="#49e3e3")
titulo.place(relx=0.35, rely=0.05)

sub1 = Label(text="Volts:",
               font=("Arial", "15", "bold"), bg="#103030", fg="#49e3e3")
sub1.place(relx=0.15, rely=0.25)
Volts = StringVar()
Volts_entrada = Entry(textvariable=Volts,
                      font=("Arial", "12", "bold"),
                      bg="white", fg="blue", justify='center')
Volts_entrada.place(relx=0.45, rely=0.26, relwidth=0.35)
Volts_entrada.focus()

sub2 = Label(text="Amperes:",
               font=("Arial", "15", "bold"), bg="#103030", fg="#49e3e3")
sub2.place(relx=0.15, rely=0.4)
Amperes = StringVar()
Amperes_entrada = Entry(textvariable=Amperes,
                      font=("Arial", "12", "bold"),
                      bg="white", fg="blue", justify='center')
Amperes_entrada.place(relx=0.45, rely=0.41, relwidth=0.35)
def limpar():
    Amperes_entrada.delete(0,END)
    Volts_entrada.delete(0, END)
    resultado_texto.config(text="")
def app():
    try:
        v = float(Volts.get())
        a = float(Amperes.get())
        watts = v * a
        resultado_texto.config(text=f"{watts:.2f} Watts")
    except ValueError:
        resultado_texto.config(text="Por favor, insira números válidos")



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

but_limpar = Button(text="Limpar", bd=2, bg='#107db2', fg='white',
                    font=('verdana', 12, 'bold'), command=limpar)
but_limpar.place(relx=0.4, rely=0.55, relwidth=0.25, relheight=0.1)

but_sair = Button(text="Sair", bd=2, bg='#107db2', fg='white',
                  font=('verdana', 12, 'bold'), command=root.destroy)
but_sair.place(relx=0.7, rely=0.55, relwidth=0.25, relheight=0.1)

resultado_texto = Label(font=("Arial", 12, "bold"), bg="#cfe2f3")
resultado_texto.place(relx=0.05, rely=0.7, relwidth=0.9, relheight=0.15)

root.mainloop()