Need help with : SUM a number to a given number from text

I want to Sum the number 30 to the already given number 1. It is working only when I have one 1 , having 2 ones (1 1) it does not work. What I need to have as output is 31 31.
So I would split those 2 given numbers but I am not able to do it. Any clues ?

Welcome

Thank you for the reply.

I actually need to have as output A A = 31 31

When inserting just one letter, it is working perfectly, but when inserting 2 or more letters it is not working anymore.

Is this a school project ? Cause I saw a similar question in MIT App Inventor community

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Some people just spam multiple communities because they have no patience.