It's Pi Day! How Pi is used in meteorology 01:41 (CBS DETROIT) - Pi is a mathematical constant with over 50 trillion digits beyond the decimal point, so we will stick with the rounded number 3.14 ...

When rounding to the nearest 1,000, numbers with 500 in the hundreds column are rounded up to the next thousand. For example, 1,500 would round up to 2,000. Numbers below 500 are rounded down.