Pi 100 Digits Spiral Math Teacher Pi Day Coaster

Pi to 100 decimal places, spiralling inward to the iconic π symbol at the centre. This mathematics-themed coaster features crisp cream serif numerals on a deep charcoal background with rich gold accents, balancing nerdy precision with bold graphic style. A great pick for Pi Day (March 14), math teacher appreciation, graduation, or the office desk of any mathematician, engineer, physicist, or science lover. The 100-digit spiral is a fun conversation starter — see how far your friends can recite before they tap out. Pairs well with other math, physics, and STEM designs in the shop. Makes a thoughtful pick for math majors, calculus survivors, geometry teachers, and anyone who appreciates the strange beauty of irrational numbers.