If you actually click on the cell, you'll see that, is equal to 1 over the standard deviation, 1.581. And I just directly referenced the cell there. Divide it times the square root of 2 pi. And I always go on in awe of the whole notion of e to the i pi is equal to negative 1 and all of that. But this is another amazing thing, that all of a sudden we have this, as we take many, many, many trials, we have this formula that has e and pi in it and square roots. But once again, these two numbers just keep showing up, and it tells you something about the order of the universe with a capital O. But let's see, so times e to the minus 1 half times x.