Following rules are followed while multiplying the integers,
1. If both the integers being multiplied are either positive, or both are negative, then the product will always be positive.
2. If one of the integers is positive while the other is negative, then the product will always be negative.
Following rules are followed while dividing integers, (the most important thing is to make sure that the denominator is non zero, otherwise the division will take indeterminate form)
1. If both the integers are either negative, or both are positive, then their quotient will always be a positive value.
2. If the integers being divided are of opposite sign, that is, one of them is negative while the other is positive, then the quotient of the two numbers will always be negative.