You can provide sufficient precision simply by scaling the values up until the level of precision you need (e.g. number of decimal points) is represented by big enough steps up/down in whatever medium is used to make the error rate low enough
E.g. consider if you step on pair of analog bathroom scales and you only care about precision to the kg or lbs - you don't then need the scales to be exact. You just need their precision to be sufficiently big that the needle is sufficiently likely to be closest to the right kg to account for what error rate you're prepared to tolerate.
E.g. consider if you step on pair of analog bathroom scales and you only care about precision to the kg or lbs - you don't then need the scales to be exact. You just need their precision to be sufficiently big that the needle is sufficiently likely to be closest to the right kg to account for what error rate you're prepared to tolerate.