Bluebulb Projects' The Measure of Things presents:
4,500 is about one-twenty-thousandth the number of Copies of Wii Sports Sold.
In other words, it's 0.000054420 times the count of Copies of Wii Sports Sold, and the count of Copies of Wii Sports Sold is 18,380 times that amount.
(a.k.a. Wii スポーツ, a.k.a. Wi Supotsu
) (2006 edition) (sales figures as of March 31, 2015)