Use the form below to do your conversion.
Solution
Step1
Log219721=Log(9721) ÷ Log(21)
Log(9721)= 3.9877109431303
Log(21)=1.3222192947339
Log219721=3.9877109431303 ÷ 1.3222192947339
Ans=3.0159225167961
Step2
Alternatively, the logarithm can be calculated like this.