Use the form below to do your conversion.
Solution
Step1
Log213997=Log(3997) ÷ Log(21)
Log(3997)= 3.6017341482601
Log(21)=1.3222192947339
Log213997=3.6017341482601 ÷ 1.3222192947339
Ans=2.7240066474638
Step2
Alternatively, the logarithm can be calculated like this.