I'll see you and raise you a © .

Which in my book is c, the speed of light in a vacuum, 299792458 m/s, a mere 9 digits, but inscribed in a circle using Steinhaus–Moser notation[1] is equivalent to a number so mindbogglingly big that I'm not even going to attempt to calculate its measure.[2]

[1]: http://en.wikipedia.org/wiki/Steinhaus%E2%80%93Moser_notatio...

[2]: Not that it makes any sense to perform this operation on c, but I think that use of © in this way is much more interesting than its current usage.