Use the form below to do your conversion.
Solution
Step1
Log73991=Log(3991) ÷ Log(7)
Log(3991)= 3.601081727784
Log(7)=0.84509804001426
Log73991=3.601081727784 ÷ 0.84509804001426
Ans=4.2611407875508
Step2
Alternatively, the logarithm can be calculated like this.