Hotel Sax is a 4 star hotel, located in the city center of Chicago. The hotel has got convenient location within easy Carl F. Gauss 1777 – 1855 Charles Darwin 1809 – 1882 Grigori Perelman *1966 Blaise Pascal 1623 – 1662 Nicolaus Copernicus 1473 – 1543 Euclid 300 BC pi Carl F. Gauss 1777 – 1855 Terence Chi-Shen Tao *1975 Charles Darwin 1809 – 1882 ln(exp(pi / 7)) Rene Descartes 1596 – 1650 Gottfried Leibniz 1646 – 1716 pi Michael Faraday 1791 – 1867 Carl F. Gauss 1777 – 1855 Dmitri Mendeleev 1834 – 1907 pi scientific calculator sin(pi / (g + 1)) Rene Descartes 1596 – 1650 Johannes Kepler 1571 – 1630 Andrey Markov 1856 – 1922