67 in pi is preceded by the three digits 555. Every gematria value easily relates to 223, 556 or 1223. * 667 + 556 = 1223 * 818 - 262 = 556 * 278 * 2 = 556 * 278 - 55 = 223 Chinese
national, Zu Chongzhi used a 24576 sided polygon to estimate Pi as being between 3.1415926 and 3.1415927. Zu proposed a fractional estimate of 355/113 which has become known as Zu's Ra
