Use the form below to do your conversion.
Solution
Step1
Log213947=Log(3947) ÷ Log(21)
Log(3947)= 3.5962671263955
Log(21)=1.3222192947339
Log213947=3.5962671263955 ÷ 1.3222192947339
Ans=2.7198719158906
Step2
Alternatively, the logarithm can be calculated like this.