Use the form below to do your conversion.
Solution
Step1
Log217981=Log(7981) ÷ Log(21)
Log(7981)= 3.9020573108085
Log(21)=1.3222192947339
Log217981=3.9020573108085 ÷ 1.3222192947339
Ans=2.9511423153099
Step2
Alternatively, the logarithm can be calculated like this.