This component is designed to enter large numbers or to include decimals. For simple integer value like rating please consider using the signal component.
It can be text as well as symbols ( Dollars, $, Euros, €, days, etc). It can also be left empty. The unit will only be sent to Salesforce if it updates a text fields.
Set the number of decimals you allow for the answer.
Please see the detailed article on SalesForce actions.
Extra settings : When value reaches
If the answer should create a record in an object, you can decide to trigger the action only if a minimum value has been reached.