I was being a bit facetious. My underlying point was that the network overhead on a microcomputer likely overwhelms a "Beowulf cluster" (to use a 1990s term) of

I was being a bit facetious. My underlying point was that the network overhead on a microcomputer likely overwhelms a "Beowulf cluster" (to use a 1990s term) of them, so 10,000 microcomputers in practice won't be anywhere near 10,000x the performance of a single microcomputer. What then is the goal of estimating the aggregate raw MFLOPs for the USSR? As a side point, Apple doesn't allow a compiler or language interpreter on their iPhone, so unless they either had the app beforehand, or access to a development machine, they won't be able to anything with it. While if they had an Apple ][ they could start right away in Apple BASIC on the ROM.