I want to use comparison logic in two inputs

I am collecting an area measurement ( Total Land ) in one of my survey questions. Subsequently, I am asking the land type-wise area ( Land A, Land B and Land C). Now I want, if the Area of Land A + Land B+ Land C is not equal to data enter in “Total Land”. There should be error caution. How can I do it.

Maybe this post discussed previously should help you solve your issue:

Great help

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I want the enumerator should not go forward without addressing it. Is there any method to do it

If you are using Enketo, try submitting your data and it should be submitted. If you are using KoBoCollect android app, you will not be able to move forward without addressing it.