That does not seem right, depending on how you calculate, 100 km to 1000 km seems more realistic. The ratio between 7 nm and 12" is 43.5 million, that makes a 20 mm x 10 mm die 870 km x 435 km. But as we all know 7 nm is just a marketing term, so for a more realistic estimate, you have to pick some feature and scale that up to 12". That will bring you down an order of magnitude or so, but you are not going to end up in the meters range.