Use the form below to do your conversion.
Solution
Step1
Log209991=Log(9991) ÷ Log(20)
Log(9991)= 3.9996089589714
Log(20)=1.301029995664
Log209991=3.9996089589714 ÷ 1.301029995664
Ans=3.0741865847068
Step2
Alternatively, the logarithm can be calculated like this.