Use the form below to do your conversion.
Solution
Step1
Log216661=Log(6661) ÷ Log(21)
Log(6661)= 3.8235394336569
Log(21)=1.3222192947339
Log216661=3.8235394336569 ÷ 1.3222192947339
Ans=2.8917589153971
Step2
Alternatively, the logarithm can be calculated like this.