Django tabular input form (user can key in data into table)

I attempt to create a tabular input form. User can key in data into the table cells. The table should have 100 rows. The following is an illustration of the end goal.

However, if such table is not possible, a suggestion to create the following table is also welcomed!

This is what I have tried:

forms.py

class SampleInputForm(forms.Form):
    x = forms.FloatField()
    y = forms.FloatField()

views.py

class ToolView(View):
    def get(self, request):

        table_rows = 10
        sample_form_set_factory = formset_factory(SampleInputForm, extra = table_rows)
        sample_form_set = sample_form_set_factory()

        context = {
            'sample_form' : sample_form_set,
        }
        return render(request, 'tools/tools.html', context)

html file

{% csrf_token %}
<form method="post">
    <table>
        <tr>
            <th>Input</th>
            <th>Output</th>
        </tr>
        {{sample_form}}
    </table>
</form>

However, this attempt does not form a table. The Y input field is displayed below the X, hence not forming a table.

<form method="post">
    <table>
        <thead>
            <tr>
                <th>Input</th>
                <th>Output</th>
            </tr>
        </thead>
        <tbody>
            {% for form in sample_form %}
            <tr>
                <th>
                    {{ form.x }}
                </th>
                <th>
                    {{ form.y }}
                </th>
            </tr>
            {% endfor %}
        </tbody>
    </table>
</form>