If I were to multiply 16 times eight, it would be 128. It's two times eight times eight. So two times 64, 128. So this is going to be negative 12.8. And just to really hit the point home of what we're doing, this is, we're going to, it's negative, the number of words, the rate of change is negative 12.8 words per day. So if you believe this model for how many words we know on a given day, this is saying on day two, or right at the day two point, right after two, exactly two days after studying for the test, I'm going to be, right at that moment, I am essentially losing 12.8 words per day. The number of words I know is decreasing by 12.8 words per day.