Use the form below to do your conversion.
Solution
Step1
Log219901=Log(9901) ÷ Log(21)
Log(9901)= 3.9956790605116
Log(21)=1.3222192947339
Log219901=3.9956790605116 ÷ 1.3222192947339
Ans=3.021948837402
Step2
Alternatively, the logarithm can be calculated like this.