Calculating functions with python / django

I'm building a python / django portfolio and i'm having a very hard time with one of my Gym / BMI calculator.

I'm trying to have a user input their current Weight and Height, so they can have a BMI result that will be visible from the frontend, and then POST and saved from the Backend models.

I just don't know how to include a .py class that i created that will allow the user to input those details from the models and have calculation done in the frontend from the input textfield.

Please help...:-)

`

from django.db import models

# Create your models here. (<-- This is my Model, where i'll save the calculation)

class BMI(models.Model):
    Name = models.CharField(max_length=50)
    Surname = models.CharField(max_length=50)
    Weight = models.IntegerField()
    Height = models.IntegerField()
    
    def __str__(self):
        return self.Name

# Create your forms here. (<-- This is my form, where user will be inputting their Weight and Height)
from django import forms
from django.forms import ModelForm
from . models import BMI

class BMIForm(ModelForm):
    class Meta:
        model = BMI
        fields = ['Weight', 'Height']

`

from django.shortcuts import render
from . models import BMI
from . forms import BMIForm

# Create your views here.
def Home(request):
    BMIOutcome = BMIForm
    return render(request, 'Experiment/Home.html',
    {'BMIOutcome':BMIOutcome})

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