Use the form below to do your conversion.
Solution
Step1
Log74015=Log(4015) ÷ Log(7)
Log(4015)= 3.6036855496147
Log(7)=0.84509804001426
Log74015=3.6036855496147 ÷ 0.84509804001426
Ans=4.2642218760251
Step2
Alternatively, the logarithm can be calculated like this.