Use the form below to do your conversion.
Solution
Step1
Log218731=Log(8731) ÷ Log(21)
Log(8731)= 3.9410639882199
Log(21)=1.3222192947339
Log218731=3.9410639882199 ÷ 1.3222192947339
Ans=2.9806432290893
Step2
Alternatively, the logarithm can be calculated like this.