Use the form below to do your conversion.
Solution
Step1
Log139721=Log(9721) ÷ Log(13)
Log(9721)= 3.9877109431303
Log(13)=1.1139433523068
Log139721=3.9877109431303 ÷ 1.1139433523068
Ans=3.5798148396615
Step2
Alternatively, the logarithm can be calculated like this.