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<DIR>   pdf
          -> Two Tricks with Arithmetic, Perelman & Gardner.pdf
          -> Two Tricks with Arithmetic, Perelman & Gardner.pdf.raw-conversion.utf-8.txt
          -> Two Tricks with Arithmetic, Perelman & Gardner.pdf.vga-gif.zip (more in 'pdf'...)
<DIR>   text
          -> Multiplication on your computer, and how integer overflow happens.ascii.txt.utf-8.txt
          -> Do you see addition in the multiplication table.ascii.txt.utf-8.txt
          -> multiplication table.generator.pl (more in 'text'...)