Use the form below to do your conversion.
Solution
Step1
Log217771=Log(7771) ÷ Log(21)
Log(7771)= 3.8904769089602
Log(21)=1.3222192947339
Log217771=3.8904769089602 ÷ 1.3222192947339
Ans=2.9423840088063
Step2
Alternatively, the logarithm can be calculated like this.