How do you use your calculator to evaluate log 25.65?

Please note that an expression like log 25.65 is ambiguous, since no base is specified. In this case, either base 10 or base e might be assumed, depending on the context.

In some calculators, especially older ones, you would press the number 25.65, then press one of the log keys. There is usually one for base 10, and one for base e. In newer calculators, you press the one of the log keys first, then the number, then something like enter.