Use the form below to do your conversion.
Solution
Step1
Log213905=Log(3905) ÷ Log(21)
Log(3905)= 3.5916210382133
Log(21)=1.3222192947339
Log213905=3.5916210382133 ÷ 1.3222192947339
Ans=2.7163580599057
Step2
Alternatively, the logarithm can be calculated like this.