Screenshot of a social post by '@neiltyson'. The post says: 'March 14 Happy birthday Albert Einstein - Born today in 1879. Happy Pi Day (3.14) to everyone else. Measure the circumference of a flat circle of any size. Divide by its diameter, and you get Pi. The approximation 3.14 is 99.95% accurate. Good for most Pi emergencies.'
https://media.universeodon.com/media_attachments/files/112/095/000/162/130/470/original/219a93bd2bf2ed43.jpg