Use the form below to do your conversion.
Solution
Step1
Log214015=Log(4015) ÷ Log(21)
Log(4015)= 3.6036855496147
Log(21)=1.3222192947339
Log214015=3.6036855496147 ÷ 1.3222192947339
Ans=2.7254825004954
Step2
Alternatively, the logarithm can be calculated like this.