Use the form below to do your conversion.
Solution
Step1
Log21641=Log(641) ÷ Log(21)
Log(641)= 2.8068580295188
Log(21)=1.3222192947339
Log21641=2.8068580295188 ÷ 1.3222192947339
Ans=2.122838503944
Step2
Alternatively, the logarithm can be calculated like this.