Steve Jobs unveils the first iPhone on January 9, 2007.
Steve Jobs unveils the first iPhone on January 9, 2007. - 
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Marketplace

It's quiz time on Marketplace Tech. 4 million songs. 82,857 address books. $1,999. $14,000 per square foot: Can you guess what these numbers mean?

This week, Ben faces off with Sam Biddle, editor of Gawker's tech news and gossip website, ValleyWag. Click on the audio player above to play along.

“I think the best compliment I can give is not to say how much your programs have taught me (a ton), but how much Marketplace has motivated me to go out and teach myself.” – Michael in Arlington, VA

As a nonprofit news organization, what matters to us is the same thing that matters to you: being a source for trustworthy, independent news that makes people smarter about business and the economy. So if Marketplace has helped you understand the economy better, make more informed financial decisions or just encouraged you to think differently, we’re asking you to give a little something back.

Become a Marketplace Investor today – in whatever amount is right for you – and keep public service journalism strong. We’re grateful for your support.

Follow Ben Johnson at @@TheBrockJohnson