How to set up a default answer that depends on a calculation

Hi,
I want to create a decimal question with a default answer set with the result of a calculation (the idea is that the respondent will just check if the number is correct).

I created my calculate question named prix_prod, which is working fine, and I tried writing ${prix_prod} in the default column for my decimal question. But when I do a preview of the form, the answer field of the decimal question stays blank. Do you have a solution?

Thank you !

@Assist2.ma, kindly please be informed that as of now, the default will only support the stagnant value and does not support the dynamic value.

Ok, thanks for your answer