Can you take another pic of it because it is blurry
To calculate the circumference multiply the radius by 2 to get the diameter. Multiply the result by π, or 3.14 for an estimation.
3.22x 2 = 6.44
6.44x π= 20.23185668911827
rounded to the nearest ten: 20.2
27/5 - 10/3
81/15 - 50/15
31/15
2 1/15