Use the form below to do your conversion.
Solution
Step1
Log217921=Log(7921) ÷ Log(21)
Log(7921)= 3.8987800132898
Log(21)=1.3222192947339
Log217921=3.8987800132898 ÷ 1.3222192947339
Ans=2.9486636814466
Step2
Alternatively, the logarithm can be calculated like this.