Use the form below to do your conversion.
Solution
Step1
Log213953=Log(3953) ÷ Log(21)
Log(3953)= 3.596926814343
Log(21)=1.3222192947339
Log213953=3.596926814343 ÷ 1.3222192947339
Ans=2.720370840653
Step2
Alternatively, the logarithm can be calculated like this.