And now that we're in this position, we allow cycle number two to take place because now we have two DNA molecules and at one we begin with two. And so after two cycles, each one of these will be amplified to two. So we have two form from this, two form from this. So after two cycles of PCR, we're going to have a total of four individual copies of that DNA. So we see that after three cycles we're going to have two times two times two. So eight.