Use the form below to do your conversion.
Solution
Step1
Log213907=Log(3907) ÷ Log(21)
Log(3907)= 3.5918434112248
Log(21)=1.3222192947339
Log213907=3.5918434112248 ÷ 1.3222192947339
Ans=2.7165262415472
Step2
Alternatively, the logarithm can be calculated like this.