The utterly lovely Johnny Ball – long time aficionado and populariser of mathematics – breaks down the astonishing alternative calculation method of Russian Multiplication, which, he assures us, always works.
My God. It’s full of Apps…
Stupid Calculations has worked out that – tiled and stacked together – the 352,292,000-odd iPhones sold since the launch in 2007 would form a one-iPhone thick monolith screen (based on the average screen area of all iPhone models) 868m wide and 1,542m tall – wider than Central Park and taller than any skyscraper in Manhattan.
More stats on the 2001: A Space Odyssey style monophone here.