Use the form below to do your conversion.
Solution
Step1
Log21661=Log(661) ÷ Log(21)
Log(661)= 2.8202014594856
Log(21)=1.3222192947339
Log21661=2.8202014594856 ÷ 1.3222192947339
Ans=2.1329301960105
Step2
Alternatively, the logarithm can be calculated like this.