Error Multiplication

[Alessio]

hi i need your help, in a label I want to make a multiplication between a value of a drop-down list and a text input value.

 I attach the photos of the fields with their code.

Below is another example of calculation:
Sum of values in two drop-down lists

[Jeff_Thorpe · Accepted solution]

Have you tried using the the Value() with each of the fields to make sure they get converted to a number before they get calculated?

Example: Value(TextInput.text) * Value(Valorie_18.Text)  

                Sum( Value(Valorie_16.Text), Value(Valorie_18.Text))