If you want to have an overview of selected accounts in an account collection, together with their mapped numbers, you can do so by using the object original_number.
Like this:
{% input custom.selection.accounts as:account_collection range:"1,2,3,4,5,6,7" accounts_var:accounts %}
{% stripnewlines %}
{% for acc in accounts %}
{% if forloop.first %}
{% newline %}
| {% t "Name" %}
| {% t "Number" %}
| {% t "Mapping number" %}
| {% t "Value" %}
{% newline %}
|----40%----
|----10%----
|----20%----
|-----------:+
{% endif %}
{% newline %}
| {{ acc.name }}
| {{ acc.number }}
| {{ acc.original_number }}
| {{ acc.value as:currency }}
{% endfor %}
{% newline %}
{% endstripnewlines %}