Since it came out in paperback on April 3, 50 Shades of Grey has ridden high on the bestseller list. It, plus the other two volumes in the series – and now, a classy boxed set of the trilogy – have sold a combined 7,380,472 print copies at outlets tracked by Nielsen BookScan. That’s a lot of books. But sales figures only tell part of the staggering success story. What does 50 Shades mean in terms of Hummers? Or Empire State Buildings? Or Chicago Bulls? These were questions the mathematically hopeless editors at PWxyz just had to find answers to. So we burned out a Radio Shack’s worth of graphing calculators on our quest for the truth about America’s top book. Here’s what we came up with – 50 Shades, done 23 ways.

2,863,541: total weight in pounds of print copies of 50 Shades of Grey sold

–equivalent to 433 Hummer H2s

1,264,443: total weight in pounds of print copies of 50 Shades Darker sold

1,257,657: total weight in pounds of print copies of 50 Shades Freed sold

347,264: total weight in pounds of print copies of 50 Shades boxed set sold

5,732,905: total weight in pounds of all editions sold

– equivalent to 867 Hummer H2s

51 miles: height of all copies of 50 Shades of Grey stacked up

- equivalent to 187 Empire State Buildings

112 miles: height of all volumes of 50 shades trilogy stacked up

- equivalent to 407 Empire State Buildings

2 seconds: how often a copy of 50 Shades of Grey has sold since going on sale

199,289,998: hours spent reading, at 1 minute per page (all books in trilogy, not counting boxed set)

- that’s about 22,750 years

- or 290 lifetimes, at a 78.5 year life expectancy

927 miles: distance copies of all editions sold would stretch if lined up

-that’s about how far it is from L.A. to Seattle

$75,984,262: amount spent on print copies, based on average online discount prices

-which is enough to pay the Chicago Bulls payroll for a year ($69,213,149), and have

-$6.7 million left over to buy 34 Virgin Galactic tickets – at $200,000 each — to take the players and their wives on trips to outer space

12: number of Olympic swimming pools you could fill with all copies sold

195.5: acres covered if you set out all copies next to one another

-equivalent to 1.3 x the floor area of the Pentagon

(These figures are real, by the way. We used the dimensions, weight, and page count listed on Amazon; online discount price is the average sale price of the books at Amazon.com, BN.com, and Booksamillion.com. Hat tip to WolframAlpha.)