How to dynamically create multiple fields in a form (angular)?

Question

Angular

Good afternoon.
The task is this: there is a form with a large number of original fields. (input, select) I use FormControl for this through a service, it is very convenient. But now you need to add dynamically the fields of such a plan - there are three inputs height, width of the blank, there can be a lot of blanks. It is necessary that the user can add these fields on the go, and then they are used in further calculations. Tell me how this can be implemented?