1999*3.14 = 2000*3.14 - 3.14 = 6280 - 3.14 = 6276.86
199.9*3.14 = 1999 * 3.14 / 10 = 627.686
19.99*3.14 = 199.9*3.14 / 10 = 62.7686
1999*3.14 = 2000*3.14 - 3.14 = 6280 - 3.14 = 6276.86
199.9*3.14 = 1999 * 3.14 / 10 = 627.686
19.99*3.14 = 199.9*3.14 / 10 = 62.7686