Use the form below to do your conversion.
Solution
Step1
Log213989=Log(3989) ÷ Log(21)
Log(3989)= 3.6008640363098
Log(21)=1.3222192947339
Log213989=3.6008640363098 ÷ 1.3222192947339
Ans=2.7233485781453
Step2
Alternatively, the logarithm can be calculated like this.