Use the form below to do your conversion.
Solution
Step1
Log213971=Log(3971) ÷ Log(21)
Log(3971)= 3.5988998870639
Log(21)=1.3222192947339
Log213971=3.5988998870639 ÷ 1.3222192947339
Ans=2.7218630838299
Step2
Alternatively, the logarithm can be calculated like this.