Use the form below to do your conversion.
Solution
Step1
Log219707=Log(9707) ÷ Log(21)
Log(9707)= 3.9870850296241
Log(21)=1.3222192947339
Log219707=3.9870850296241 ÷ 1.3222192947339
Ans=3.0154491357854
Step2
Alternatively, the logarithm can be calculated like this.