I had to laugh when reading about the Fantasy "Calculators" - included as a fantasy is a "Slide Rule" - when I took my grade 12 physics provincial finals in 1987, I didn't have a calculator with me, but that was not unexpected, so students were also provided with a booklet of log tables - a predecessor, of course, to the slide rule.
The log tables, of course, were more than sufficient for whatever complex multiplication and division that had to be done.
These are still used frequently in high schools across the world. For example, Indian high schools following the CBSE system do not allow calculators, but log tables are permitted for some courses.
Yep, at my high school in New Zealand we were required to learn how to use log tables, even though we all had calculators. I don't know if it was a compulsory part of the curriculum though, and I wouldn't be surprised if they don't do it any longer.
The log tables, of course, were more than sufficient for whatever complex multiplication and division that had to be done.