Primary school pi formula table: a pot of wine in a temple on the top of the mountain makes you happy and bitter. Eat the wine, kill you, never die, and make you happy. Die Shanshan, take a second wife. Save my light! Not only the wife was saved, but also his uncle and third wife. I cheated on my dad, my uncle (actually pulling my uncle's ear) and my wife. Don't run! Commander, don't run! Hold dad for a long time!

3. 14 1592653589793238462643383279502884 197 169399375 1058209749445923078 16 4062862089986

Brief introduction of pi: pi is a mathematical constant representing the ratio of the circumference to the diameter of a circle, which is expressed by the Greek letter π.

π is also equal to the ratio of the square of the area and radius of a circle, and the approximate value is about 3.141592653589793, which is the key value for accurately calculating the geometric shapes such as the circumference of a circle, the area of a circle, the volume of a sphere, etc. In the analysis, π can be strictly defined as the smallest positive real number x satisfying sinx=0.

Historical development of pi: a stone tablet in ancient Babylon (about 1900 BC to 1600 BC) clearly recorded pi =25/8=3. 125. The mathematical papyrus of Rhind, an ancient Egyptian cultural relic of the same period, also shows that pi is equal to the square of the score 16/9, which is about 3. 1605.