The DS launched earliest in the US, on November 21, 2004, close to 795 days ago. That number converts to approximately 1.145 million minutes, which would give Nintendo sales figures of 10.3 million portable systems -- certainly a lot more precise than previous ventures by Nintendo into the magical world of Arithmetic. Still, who are we to judge Nintendo's math skills when scientists are working to define a new number that explains the DS's sales numbers in Japan (sources tell us they'll likely go with "Nintend-illion").
[Update 1: Title used to refer to Western Hemisphere, which was used to reference the Americas but not any portion of Europe or Africa that subsequently lie in the West. Headline has been changed.]