Use the form below to do your conversion.
Solution
Step1
Log216415=Log(6415) ÷ Log(21)
Log(6415)= 3.8071966607109
Log(21)=1.3222192947339
Log216415=3.8071966607109 ÷ 1.3222192947339
Ans=2.8793988076517
Step2
Alternatively, the logarithm can be calculated like this.