Normal floppy drives can actually only hold about 1.4mb. I believe Mac floppies can hold more, possibly towards 2mb, but I have no idear really. There was a time when they sold 2.8mb floppy drives for PCs but they never seemed to catch on.
There's also something called an LS-120 drive which is similar to a floppy except it can hold about 120mb, but I'm betting you don't have one of those.
There's zip-disks too, which I think are still around, and come in various sizes.
If you really need to get this file onto floppies, you can use something like Winzip's span-disk option. It lets you compress a file and break it up onto multiple disks, then you can combine it back together with Winzip on the other computer.
HOPE THAT HALPS~