>> When the base, here, is the same as this number, it turns out that we can quickly come to a conclusion. You may already what the conclusion is, but it's kind of like -- well, this one's just so easy. Let's just interpret it directly. What is the exponent applied to 5 that will give 5? Well, it's simply 1, you see? So when this number and that one are exactly the same, the result is one. Here's another one, similar idea. I mean, we can interpret this one very quickly, but notice that we have log base 5 of 5 cubed here. Now, the interpretation is that we're looking for an exponent to apply to 5 that would give 5 cubed, you see? So all it is is 3. Now, we can see it very easily if we set it equal to N, and we say, "5 to the N power is equal to 5 cubed." You see, just go into the exponential form, and we immediately see that N needs to be 3.