Use the form below to do your conversion.
Solution
Step1
Log217487=Log(7487) ÷ Log(21)
Log(7487)= 3.874307833128
Log(21)=1.3222192947339
Log217487=3.874307833128 ÷ 1.3222192947339
Ans=2.9301552689168
Step2
Alternatively, the logarithm can be calculated like this.