Use the form below to do your conversion.
Solution
Step1
Log217891=Log(7891) ÷ Log(21)
Log(7891)= 3.8971320433821
Log(21)=1.3222192947339
Log217891=3.8971320433821 ÷ 1.3222192947339
Ans=2.9474173148913
Step2
Alternatively, the logarithm can be calculated like this.