Calculate with fields populated automatically by a website/printing

Hello all,

So I have a problem with calculations and pre-filled values from an external website/program.

In my case, I am uploading the form to a web-based program. When printing the form from there, it should auto-fill the form with the data it has inside the system. This works fine for single values, but not for calculations.

So let's say the example is:

Value 1: form code 'value_1' -->external system will automatically populate it with the value 'x' (number)

Value 2: form code 'value_2' -->external system will automatically populate with the value 'y' (%)

Value 3: should be the sum of Value 1 x Value 2 y, so: value_1 times value_2 = xy

So before printing the document, all fields are empty. Only when printing, they should be populated with all 3 values.

However, when I try to do this, the calculation never works.

What I have tried so far:

- Formatting the fields to percentage, numbers etc,. -->no effect

- Maintaining the calculation in the extra settings tab -->does not calculate.

I want to know if anybody has had this issue before and could solve it?

I am using Adobe Acrobat XI Pro.

I really hope somebody can help me - I am a beginner in forms creation and have not been able to identify the same case in the forum.

Any help is really appreciated!