Fun With Math

I struck pen to paper, or fingers to keyboard at least, and came up with the following figures for what a stack the Department of Homeland Security is layin' in. That recent Forbes article said 1.6 billion, but that figure has creeped up since then to more than 2 billion. So, living in a modest home built in the 1950s where storage space is at a premium, I wondered what the DHS is looking at for warehousing all that brass, copper and lead.
Here's my scratchpad with roughish numbers.

Working from this link at MidwayUSA a 50-round .40 S&W carton is 6.1875 inches X 3.25 inches X 1.5 inches.

A football field, between the goal lines, is 300 feet X 12 inches = 3,600 inches long

and 160 feet X 12 inches = 1,920 inches wide

one layer of cartons would be 3,600 inches divided by 6.1875 inches = 582 cartons long

and 1,920 inches divided by 3.25 inches = 591 cartons wide

582 X 591 = 343,962 50-round cartons per layer

2 billion total rounds divided by 50 rounds per carton= 40,000,000 cartons

40,000,000 / 343,962 = 116.3 layers

116 layers X 1.5 inches = 174 / 12 = 14.5 feet deep

So, the DHS will have a football field's worth of .40 S&W hollowpoints stacked 14 and a half feet deep. Think about it.