The rule for dividing one integer by another of the same sign is that the result is always positive. For example, if you divide two positive numbers, you end up with a positive number (2/2 = 1). Similarly, if you divide two negatives, you also find a positive result (-2/-2 = 1).
When dividing one number by another of the opposite sign, you end up with a negative result, no matter which number is negative and which is positive. For example, 4/-2 = -2, while -4/2 is also equal to -2.
One exception to the rules for dividing integers is zero. When zero is the number being divided, the result will always be zero. 0/1 = 0, but so does 0/1,000,000. On the other hand, when a number is being divided by zero, it is undefined, as you cannot divide by zero and get a defined result.
The rules of dividing positive and negative numbers remain the same. Two positive numbers or two negative numbers multiplied always produce a positive number, while a number multiplied by one of the opposite sign is always be negative.