Use the form below to do your conversion.
Solution
Step1
Log87991=Log(7991) ÷ Log(8)
Log(7991)= 3.9026011306665
Log(8)=0.90308998699194
Log87991=3.9026011306665 ÷ 0.90308998699194
Ans=4.3213867797001
Step2
Alternatively, the logarithm can be calculated like this.