Use the form below to do your conversion.
Solution
Step1
Log21865=Log(865) ÷ Log(21)
Log(865)= 2.9370161074648
Log(21)=1.3222192947339
Log21865=2.9370161074648 ÷ 1.3222192947339
Ans=2.2212776043749
Step2
Alternatively, the logarithm can be calculated like this.