Water for Noah's Flood

Them FunDUHmentalist literalists insist that the Bible says the Flood that Noah built an Ark to survive covered the whole world -- above every mountain there is. I got to thinking about that the other day.

Now, the Radius of the Earth = 6,370 km on average

Height of Mt Everest - 8.848 km

Allowing for about 152 meters steerage way under the keel, call the flooded Earth's radius = 6,379 km

Spherical Volume = (4 * pi/3) * radius^3

(3.14159 / 3 = 1.0471967) * 4 = 4.188767

6,370^3 = 2.584748e11

4.188767 * 2.584748e11 = 1.082696e12 km^3 (cubic kilometers) = Volume of Earth now (VolNow)

6,379^3 = 2.595719e11

4.188767 * 2.595719e11 = 1.087286e12 km^3 = Vol of Earth, water covering Everest (VolEvr)

VolEvr - VolNow = 1.087286e12 - 1.082696e12 = 4.59e9 km^3

4.59e9 = 4,590,000,000 = 4.59 Billion (Milliard to Europeans) Cubic Kilometers

According to http://www.madsci.org/posts/archives/1997-05/864391848.Es.r.html, the oceans'
total volume is 1.347e9 km^3.

4.59e9 km^3 / 1.347e9 km^3 = 3.41 times as much water as is in all the oceans to
flood the whole earth, to 152 meters above the top of Mt Everest.

Just where is God supposedly hiding all that extra water?