Use the form below to do your conversion.
Solution
Step1
Log21307=Log(307) ÷ Log(21)
Log(307)= 2.4871383754772
Log(21)=1.3222192947339
Log21307=2.4871383754772 ÷ 1.3222192947339
Ans=1.8810331882032
Step2
Alternatively, the logarithm can be calculated like this.