Use the form below to do your conversion.
Solution
Step1
Log213931=Log(3931) ÷ Log(21)
Log(3931)= 3.5945030438201
Log(21)=1.3222192947339
Log213931=3.5945030438201 ÷ 1.3222192947339
Ans=2.7185377328376
Step2
Alternatively, the logarithm can be calculated like this.