Where I can find online logarithm equation calculator and how to use it?

Question

kittiwitti1 · Answer

http://rapidtables.com/calc/math/Log_Calculator.htm

kevin · Answer

That calculator is not for equation

mathmate · Answer

Then try https://www.wolframalpha.com/

mathmate · Answer

Then try https://www.wolframalpha.com/ But please be aware that this is not a homework tool. It is a checking tool. If you use it for homework, you will regret it at exam time.

mathmale · Answer

Please share one or more of the problems (involving logs) that you wish to solve.

kevin · Answer

@mathmale Sure I will share if I have problems about logarithm.
Anyway, how to write the base of logarithm in online calculator, I tried online calculator but I just can write "log" and its numerus. @mathmate

mathmate · Answer

As @mathmale said, if you post a problem or two that you'd like to solve, it would clarify things a lot easier.  Perhaps you don't even need a logarithm calculator.

kevin · Answer

Yeah... I know..
I mean I just want to know how to write base of logarithm in wolfram alpha.
Base of logarithm like this :
|dw:1473748234072:dw|