Chopsticks vs Trees

How many chopsticks can be manufactured out of a tree?

I was thinking about that this morning, so I google it!

There is one article that says:

"China is the world's leading maker of disposable wooden chopsticks. It produces 45 billion pairs each year. That translates into an annual loss of roughly 25 million trees."

source: http://www.thefreelibrary.com/Chopping+chopsticks:+desperate+to+save+trees,+China+slaps+a+tax+on...-a0150864927

So 45000/25 = 1800 chopsticks.... Only 1800 pairs of chopsticks?