That is going to be equal to what we need to figure out, the probability of B given A times the probability of A. But we know the probability of A. We know that that is 0.6. We know that this is 0.6. Just like that, we've set up a situation, an equation where we can solve for the probability of B given A. The probability of B given A, notice, let me just rewrite it right over here. Actually, I'll write this part first.