The division of 643 by 2 results in 321.5. When dividing an odd number by an even number, the quotient will be a decimal or fraction. In this case, the remainder is 0.5, indicating that 643 divided by 2 equals 321.5.
Oh, dude, math, really? Fine, fine. So, 643 divided by 2 equals 321.5. But like, who really needs to know that? Just use a calculator or something, man.