Use the form below to do your conversion.
Solution
Step1
Log219913=Log(9913) ÷ Log(21)
Log(9913)= 3.9962051061783
Log(21)=1.3222192947339
Log219913=3.9962051061783 ÷ 1.3222192947339
Ans=3.0223466879467
Step2
Alternatively, the logarithm can be calculated like this.