Use the form below to do your conversion.
Solution
Step1
Log213865=Log(3865) ÷ Log(21)
Log(3865)= 3.5871494982543
Log(21)=1.3222192947339
Log213865=3.5871494982543 ÷ 1.3222192947339
Ans=2.7129762154743
Step2
Alternatively, the logarithm can be calculated like this.