Use the form below to do your conversion.
Solution
Step1
Log87139=Log(7139) ÷ Log(8)
Log(7139)= 3.8536373819586
Log(8)=0.90308998699194
Log87139=3.8536373819586 ÷ 0.90308998699194
Ans=4.2671687622121
Step2
Alternatively, the logarithm can be calculated like this.