Use the form below to do your conversion.
Solution
Step1
Log216403=Log(6403) ÷ Log(21)
Log(6403)= 3.8063835018242
Log(21)=1.3222192947339
Log216403=3.8063835018242 ÷ 1.3222192947339
Ans=2.878783812174
Step2
Alternatively, the logarithm can be calculated like this.