For example, 5π is five times that of π.

The multiple of π is as follows:

1、 1π=3. 14?

2、2π=6.28

3、3π=9.42

4、4π= 12.56

5、5π= 15.7

6、6π= 18.84

7、7π=2 1.98

8、8π=25 .52

9、9π=28.26

10、 10π=3 1.4

Extended data:

Pi is the ratio of the circumference to the diameter of a circle, which is generally expressed by the Greek letter π and is a universal mathematical constant in mathematics and physics. π is also equal to the ratio of the area of a circle to the square of the radius zhi. Accurate calculation of geometric shapes such as circle perimeter, circle area and sphere volume is the key value. In the analysis, π can be strictly defined as the smallest positive real number x satisfying sin x = 0.

Pi is expressed by the Greek letter π (pronounced pài), which is a constant (approximately equal to 3. 14 1592654), representing the ratio of circumference to diameter. It is an irrational number, that is, an infinite cycle decimal.

In daily life, pi is usually expressed as 3. 14 to calculate the near-inner similarity. The fractional part 3. 14 1592654 is enough for general calculation. Even if engineers or physicists want to make more accurate calculations, they only need to take the values to a few hundred decimal places at best.