Use the form below to do your conversion.
Solution
Step1
Log217139=Log(7139) ÷ Log(21)
Log(7139)= 3.8536373819586
Log(21)=1.3222192947339
Log217139=3.8536373819586 ÷ 1.3222192947339
Ans=2.9145221199741
Step2
Alternatively, the logarithm can be calculated like this.