<Script>
var tanque = 40
var caminhoComGasolina = 480
var caminhoComAlcool = 300
document.write("o consumo de gasolina é: " + caminhoComGasolina/tanque + " Km/L ");
document.write("<br>")
document.write("o consumo de Alcool é: " + caminhoComAlcool/tanque + " Km/L ");
</Script>