Excerpt from Heiberg's Archimedes (Archimedis Opera Omnia cum Commentariis Eutocii, 1880) - Archimedes on the left, Heiberg's Latin translation on the right. From Measurement of a Circle, where Archimedes is estimating π from below with inscribed polygons. The highlighted items match, showing how Greeks of Archimedes' day represented numbers. The ε stands for 5,000, for example, the first δ for 4, the δ'' ¼.