So I actually say, what's the probability of 45 left moves? So I say the probability of 45 left moves is equal to 1 over the standard deviation. So in this situation, the standard deviation is the square root of 25, so it's 5 times 2 pi times e to the minus 1 half times 45 minus the mean, minus 50, over the standard deviation, which we figured out was 5, squared. So that tells me the value of what the normal distribution tells me for this situation with this standard deviation and this mean. And then I multiply that by 1, so you don't see that in formula, I don't actually write times 1, to actually figure out the area under the curve, right? Because remember, it's a continuous distribution function like that. This right here just gives me the value.