Compute: $98 \times 102$.
First I like to think of this as $(100-2)(100+2)$. FOILing gives $100^2-2^2$. Now we just need to remember that $100^2=10000$. And that $2^2=4$. So we have $10000-4$. Which is $9996$. Right. So $98 * 102 = 9996$.

