新人求问 model 的计算是怎么操作的

models.py
class Test(models.Model):
    t1 = models.IntegerField()
    t2 = models.IntegerField()
    result = models.IntegerField()

forms.py
class TestForm(forms.Form):
    t1 = forms.IntegerField()
    t2 = forms.IntegerField()

views.py
def calculate(request):
    if request.method == "POST":
        form = TestForm(request.POST)
        if form.is_valid():
            form_data = form.clean_data
            t = Test.objects.create(t1=form_data['t1'],t2=form_data['t2'],result=form_data['t1'] * form_data['t2'])
            t.save()
        else:
            return HttpResponse("请输入数字")
    else:
        form=TestForm()

    return render_to_response("test.html", {})

template

test.html blablabla