To multiply or divide signed integers, always multiply or divide the absolute values and use these rules to determine the sign of the answer:
The product of two positive integers or two negative integers is positive.
The product of a positive integer and a negative integer is negative.
Now while multiplying a=-65 and b=8
we multiply 65 with 8 to get 520.
Here a=-65 is negative and b=8 is positive, so we use the second rule here:
The product of a positive integer and a negative integer is negative.
So the answer will have a negative sign that is -520
Answer : product is -520
