Use the form below to do your conversion.
Solution
Step1
Log21287=Log(287) ÷ Log(21)
Log(287)= 2.457881896734
Log(21)=1.3222192947339
Log21287=2.457881896734 ÷ 1.3222192947339
Ans=1.8589063905837
Step2
Alternatively, the logarithm can be calculated like this.