Look for examples and I did not find anything, but would there be any way to perform mathematical operations between the data obtained from the input?
Namely:
Number of Products I buy:
<div class="form-group">
{!! Form::label('cantidad', 'Cantidad') !!}
{!! Form::text('cantidad', null, ['class' => 'form-control', 'placeholder' => 'Cantidad obtenida', 'required']) !!}
</div>
For the price:
<div class="form-group">
{!! Form::label('total', 'Total de la Factura') !!}
{!! Form::text('total', null, ['class' => 'form-control', 'placeholder' => 'Total' , 'required']) !!}
</div>
Get the result in a third field which is type only:
<div class="form-group">
{!! Form::label('precio_total', 'Precio Total') !!}
{!! Form::text('precio_total', null, ['class' => 'form-control', 'placeholder' => 'Precio Total' , 'required']) !!}
</div>
Assuming the ids for the elements are indicated in the code and taking into account that you would need to validate the input data in the listeners, the skeleton of the code you need is the following.
The code should be added in a fragment
<script></script>
of your web page;