Calculadora jquery 2.0

 <div class="container">
            <h2>Calculadora <b>poco científica</b></h2>
            <input type="text" class="form-control" id="num1" value="4">
            <input class="btn btn-info boton" type="button" id="suma"  value="+">
            <input class="btn btn-info boton" type="button"  id="resta" value="-">
            <input class="btn btn-info boton" type="button" id="multi"  value="*">
            <input class="btn btn-info boton" type="button"  id="divi" value="/">
            <input class="btn btn-info" type="button"  id="reset" value="Borrar campos">
            <input type="text" class="form-control" id="num2" value="5">
            <h3>=</h3>
            <input type="text" class="form-control" id="res">
            
        </div>
$(function () {
    $(".boton").click(function () {
        var n1 = Number($('#num1').val());
        var n2 = Number($('#num2').val());
        var operacion = $(this).val();
        
        $('#res').val(eval(n1 + operacion + n2));
        $('#res').after("<p>"+n1 + " " + operacion + " " +
                n2 + " = " + $('#res').val()+"</p>");
    });
    $("#reset").click(function () {
        $(':text').val("");
    });
});