See for example the 1979 story Newton's Gift, where a man is troubled by the thought that the scientific greats from hundreds of years ago had to waste months o

See for example the 1979 story Newton's Gift, where a man is troubled by the thought that the scientific greats from hundreds of years ago had to waste months or years of their lives doing manual calculations. So he invents a time travel machine, and goes back in time to give Isaac Newton a modern electronic calculator. https://scifi.stackexchange.com/questions/262571/isaac-newton-is-visited-by-a-time-traveller-who-tries-to-give-him-a-calculator https://scifi.stackexchange.com/questions/262571/isaac-newto...