Bluebulb Projects' The Measure of Things presents:
1,300,000,000 is about fifteen-and-a-half times the number of Copies of Wii Sports Sold
In other words, it's 15.720 times the count of Copies of Wii Sports Sold, and the count of Copies of Wii Sports Sold is 0.06361 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) Wii Sports, the version that was bundled with the original Wii console, has sold 82.69 million units as of March, 2015.