49 times 0.1 is 4.9 plus one, so plus 5.9. And so what is this going to be equal to? So let's see, 1.1 plus 1.9, these two are going to sum up to be equal to three. And then these two are going to sum up to be, let's see, if we add the five, we get to 8.5, and then we add the 0.9, we get to 9.4. So plus 9.4, did I do that right? Three plus five is 8.5 plus 0.9 is 1.4, yep. And so this is going to be, so once again we have the two times it all, so this is going to be equal to two times 12.4, which is equal to 24.8, which is our approximation.