That required a lot of math. (5 years and 2542 days ago)
great idea and photo
Howdie stranger!
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N.A. : Actually I'm not that old ... But in my first year in high school, as a matter of tradition, every student learned math with a slide rule (like my father), it was abolished in favor of calculators in the next year, but I kept mine as a museum piece since then... (1979) (5 years and 2546 days ago)
fantastic, bravo
Thank you
fantastic, bravo (2)
thanks
Great find, congrats!
Congrats!
Howdie stranger!
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