Lets say this new Iphone comes out and they get it in the hands of 1% of the worlds population. They're more than 7 Billion people on the planet. 7,000,000,000 x .001 = 7,000,000 people.
More math: Lets say 7,000,000 people purchase the Iphone and (making up a number) the profit margain that goes towards revenue is $200 per unit.
7,000,000 x a profit margin of $200 = $1,400,000,000
The numbers don't lie!!! That is 1.4 Billion (YES THAT IS A "B" for BILLION!!!!!!!! in gross profit!