Try this link here: http://www.code.archive.aisnota.com/
Look for the file fp-52.src.gz

It is a floating point math library. I've managed to make it work recently by tweaking some of its addresses. Anyway, it will do floating point addition, subtraction, multiplication, division etc up to 8 digits of accuracy.

If you have any problems with it, you can email me.

Good luck and have fun!