(Found) ID short story - rediscovery of arithmetic

[Tonitru]

I'm trying to find a short story I'm pretty sure is by Asimov. The only thing I remember about the title is that it is not an obvious giveaway. The plot is that in the not-too-far future, universal portable personal computers (iPad, anyone?) have resulted in the forgetting of arithmetic. An off-beat amateur rediscovers simple multiplication etc. There's a war on, and the rediscovery of pen-and-paper arithmetic becomes (somewhat improbably) a crucial secret weapon. Probably written before 1960.

 

[J-Sun]

I think it's "The Feeling of Power" (1958).

 

[Danny McG]

Too late; I was beaten to the answer by J-Sun!

The Feeling of Power - Wikipedia

(Should this be in "Book Search" )

 

[Tonitru]

That's the one! I even have an ebook copy; I just couldn't remember the title.