convert number variable to text

It would be Extremely helpful if storyline converted number to string when checking what a var is equal to. example   i have a custom question slide where the user fills in blanks like 4 or 5 per slide. Some have multiple answers that have to be tested for. the client would like the user to be able to say type in 4 or four or 4mm   as the answer BUT storyline will not do this on its own. This also something a less knowledgeable storyline author would have issues figuring out why its not working.