Okay, weird bit of pedantry - pretty sure that if a math test asks you to ‘calculate the product of 127 and 954’ you wouldn’t get many marks for answering ‘about 100,000’, but feel free to staple a copy of the dictionary definition to your exam paper and see if that works for you.

But sure, let me clarify it to: you can’t calculate a precise NPV.

You can only estimate one.

Which, when we are trying to do things like ‘calculate the total assets a bank has’, makes the net present value of their assets a not very reliable number to use.