It's like Isaac Asimov's short story, "A Feeling of Power" about a far future where humanity had forgotten how to do math manually and relied entirely on expens

It's like Isaac Asimov's short story, "A Feeling of Power" about a far future where humanity had forgotten how to do math manually and relied entirely on expensive computers to do it. But then a technician discovered the rules of arithmetic on paper and the revolutionary new human powered "graphitics" allowed them to win "the war".