Use the form below to do your conversion.
Solution
Step1
Log21989=Log(989) ÷ Log(21)
Log(989)= 2.9951962915972
Log(21)=1.3222192947339
Log21989=2.9951962915972 ÷ 1.3222192947339
Ans=2.2652795217301
Step2
Alternatively, the logarithm can be calculated like this.