Can I calculate the answer and add it to the thank you page?

Hello everyone.

I have a problem with a typeform I am trying to build.

I want to calculate the number of weeks a women has left to get an abortion and show that number on the last screen.

So I asked the question in which week of pregnancy the woman is. 

Then based on the country she is in, I want to let her know how many weeks she has left to get an abortion legally.

Is there a way to do a calculation inside a question, so that I don’t need to build a thank you screen for each possible number of weeks.

For example:

A woman is in her 5th week of pregnancy and I know she is from Germany. 

In Germany abortion is legally possible until week 14 of pregnancy. 

So I can calculate 14-5 = 7

So can I let her know: “You have 7 weeks left to get an abortion”, without having to build a separate thank you screen for each number of weeks?

Something like: “You have (14-score) weeks left to get an abortion”

Thanks in advance

Daniel