Use the form below to do your conversion.
Solution
Step1
Log21289=Log(289) ÷ Log(21)
Log(289)= 2.4608978427565
Log(21)=1.3222192947339
Log21289=2.4608978427565 ÷ 1.3222192947339
Ans=1.861187363214
Step2
Alternatively, the logarithm can be calculated like this.