Try reading your recent discussion thread that preceded this one.
We have already spent days of elapsed time and many man-hours of effort explaining why this suggestion is not workable. We’ve given you an alternative which will do what you want and exists today, but you refuse to use it. (Decimal.)
You have dismissed Decimal because you think it is too complex. To get the result you want from floats, we would need a hybrid data structure and to reimplement all the floating point functions to support this new hybrid. This will surely be more complex than Decimal, much more likely to contain bugs, and with the severe risk of surprising corner cases where this hybrid numeric type behaves in ways even more surprising than floats.
If you disagree, if you think it is so easy, go ahead and prove us wrong by implementing it. Just don’t expect other people to do it for you when they have no interest in this proposal, are sure it will be hard to do right, won’t do what you expect, and there already exists a solution that solves your problem better.