Use the form below to do your conversion.
Solution
Step1
Log139971=Log(9971) ÷ Log(13)
Log(9971)= 3.9987387162558
Log(13)=1.1139433523068
Log139971=3.9987387162558 ÷ 1.1139433523068
Ans=3.5897146008142
Step2
Alternatively, the logarithm can be calculated like this.