Use the form below to do your conversion.
Solution
Step1
Log213965=Log(3965) ÷ Log(21)
Log(3965)= 3.5982431916536
Log(21)=1.3222192947339
Log213965=3.5982431916536 ÷ 1.3222192947339
Ans=2.721366422336
Step2
Alternatively, the logarithm can be calculated like this.